Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Electronics, Lighting, & Gadgets HRM, GPS, MP3, HID. Whether it's got an acronym or not, here's where you'll find discussions on all sorts of tools, toys and gadgets.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 05-24-11, 01:18 PM   #1
borobike
Dept. store bike bandit
Thread Starter
 
Join Date: May 2011
Bikes:
Posts: 329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Want 1200 lumens for less than $45?

http://cgi.ebay.com/ws/eBayISAPI.dll...ht_3236wt_1139

Order up. I just bought one for my bike. Comes with a charger and battery too in case you don't already have one. I'll post up some output shots when it gets here.
.
.
.
borobike is offline   Reply With Quote
Old 05-24-11, 03:34 PM   #2
no1mad
Thunder Whisperer
 
no1mad's Avatar
 
Join Date: Apr 2008
Location: NE OK
Bikes: '06 Kona Smoke
Posts: 8,662
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 49 Post(s)
A single 3.7v, 2400 mAh 18650 cell is going to provide enough juice for 1200 lumens for how long? Something doesn't compute in my limited knowledge brain...

And check out the return policy: "Sale tax will be added for California residents, we're working in a share warehouse, absolutely no pickup in-person due to security concern. All sales are final, return is accepted on a exchange basis only, if good should be defective upon receipt, customer has up to 7 days from date of receipt for exchange of new one, item must be returned in its original and unused condition, good must be in its original box and packing, buyer pays return shipping fee."
__________________
Community guidelines
no1mad is offline   Reply With Quote
Old 05-24-11, 05:10 PM   #3
colleen c
I am a caffine girl
 
colleen c's Avatar
 
Join Date: Nov 2009
Location: Bay Area
Bikes: 2012 Stumpjumper FSR Comp...2010 Scott CR1 CF...2007 Novara FS Float2.0...2009 Specialized Hardrock Disc...2009 Schwinn Le Tour GSr
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
For a SST50 to produce 1200 lumens at the emitter will require over 4 amps at the led. Most likely closer to 5A. My MG X Thrower is rated at 2.8 amps at 800 lumens. Most flashlight that output 1000+ lumens usually have a 2x18650 format. Here is a Jetbeam flashlight rated at 1200 lumens with a runtime of 1 hour using 3x18650. Any legitimate flashlight manufactor or seller will give spec to their product.

Let give benefit of the doubt and say the driver in this light does drive the LED at 5 amps. There still many issue. The body of the light probably too small to dissipate heat. The battery included probably have a high IR as it heats up, and the Vdrop of the cell will rapidly drop below the 3.6v needed for the Vf of the SST50 resulting in less lumen.

All this being said, I highly doubt this is a constant 1200 lumen light.
colleen c is offline   Reply With Quote
Old 05-24-11, 05:11 PM   #4
CaptainCool
``````````````
 
CaptainCool's Avatar
 
Join Date: Feb 2007
Location: san jose
Bikes:
Posts: 764
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by no1mad View Post
A single 3.7v, 2400 mAh 18650 cell is going to provide enough juice for 1200 lumens for how long? Something doesn't compute in my limited knowledge brain...
Since this is Ultrafire, it may well be less than half of that output. Still very bright. I'd guess a runtime of 20-30 minutes. And based on previous threads about DX lights like this, don't expect it to last more than a few months of commuting.

edit: I'm probably low on the runtime, had bad numbers in my head

Last edited by CaptainCool; 05-24-11 at 08:47 PM.
CaptainCool is offline   Reply With Quote
Old 05-24-11, 05:55 PM   #5
socalrider
Senior Member
 
socalrider's Avatar
 
Join Date: Mar 2004
Location: Upland, CA
Bikes: Litespeed Liege, Motorola Team Issue Eddy Mercxk, Surly Crosscheck Cyclocross bike, Fisher Supercaliber Mtn. Bike
Posts: 5,002
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
I have bought items from Golden for years and like many of the overseas sellers, they way overstate the lumens.. Actual OTF lumens is more like 500-600 max.. Should have a runtime of 1 hour on high, 45 minutes and 15 min in med mode with diminishing output.

The only way to get output like that is direct drive which would give you a runtime of 30 minutes on high mode, which this light does not have.. You would need a copper heat sink for such a small head to help dissipate the heat..
socalrider is offline   Reply With Quote
Old 05-24-11, 06:00 PM   #6
borobike
Dept. store bike bandit
Thread Starter
 
Join Date: May 2011
Bikes:
Posts: 329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You all raise good points, I'm not very well spoken in LED flashlight technology. Either way I'm sure it will be a lot brighter than the Fenix L2D flashlight that I have. It's been a great flashlight for years but it only puts out around 125 lumens max, and that's in it's "turbo mode". Realistically I can only run it at 80 lumens for any extended period of time.
.
.
.
borobike is offline   Reply With Quote
Old 05-24-11, 06:25 PM   #7
colleen c
I am a caffine girl
 
colleen c's Avatar
 
Join Date: Nov 2009
Location: Bay Area
Bikes: 2012 Stumpjumper FSR Comp...2010 Scott CR1 CF...2007 Novara FS Float2.0...2009 Specialized Hardrock Disc...2009 Schwinn Le Tour GSr
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by borobike View Post
You all raise good points, I'm not very well spoken in LED flashlight technology. Either way I'm sure it will be a lot brighter than the Fenix L2D flashlight that I have. It's been a great flashlight for years but it only puts out around 125 lumens max, and that's in it's "turbo mode". Realistically I can only run it at 80 lumens for any extended period of time.
.
.
.
Being a SST50, it hard to not to get some pretty good fair amount of light out of it. I would suggest trying the battery That comes with it and if your're not satisfy, then try one AW 18650 2600 mah battery from 4sevens or other online places. Expensive but well worth the cost. A good battery can make a difference between constant light output throughout most of the range vs lost of light output prematurely. My MG SST50 Rocket barely get one hour of runtime with Trustfire and the last 15 minutes are dimmer than the first 45 minutes. Using AW 18650, the brightness remains constant for an hour and dims a little after that for another 15 to 20 minutes before shutting off.
colleen c is offline   Reply With Quote
Old 05-24-11, 06:40 PM   #8
rscamp
Senior Member
 
rscamp's Avatar
 
Join Date: Jun 2008
Bikes:
Posts: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You can put a dummy cell in it, bring the wires out and power it with any number of parallel cells...
rscamp is offline   Reply With Quote
Old 05-24-11, 07:30 PM   #9
colleen c
I am a caffine girl
 
colleen c's Avatar
 
Join Date: Nov 2009
Location: Bay Area
Bikes: 2012 Stumpjumper FSR Comp...2010 Scott CR1 CF...2007 Novara FS Float2.0...2009 Specialized Hardrock Disc...2009 Schwinn Le Tour GSr
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by rscamp View Post
You can put a dummy cell in it, bring the wires out and power it with any number of parallel cells...
Kinda like this


I drill a hole in my DX P7 and mounted it on a mini tripod and 4P cell holder. Made that light a work station light. sure beat the heck out of drop light and extension cord.
colleen c is offline   Reply With Quote
Old 05-24-11, 08:04 PM   #10
borobike
Dept. store bike bandit
Thread Starter
 
Join Date: May 2011
Bikes:
Posts: 329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Neat idea, I may have to try something like that for extended battery life!

I ended up finding the actual specs on this flashlight. Depending on which source you trust, it looks like the output of the Ultrafire SST-50 is 80-100 lumens on the low setting, 250-400 lumens on the medium setting, and >600 to 800 max lumens on the high setting. Good enough for me. I'll probably ride around on the medium setting, one vendor said not to run it on high for more than 5 minutes or it will overheat. My Fenix said the same thing when I got it about the turbo mode. Think it's a valid concern? 600-800 lumens would be pretty sweet but I don't want to burn anything.
.
.
.
borobike is offline   Reply With Quote
Old 05-24-11, 08:56 PM   #11
CaptainCool
``````````````
 
CaptainCool's Avatar
 
Join Date: Feb 2007
Location: san jose
Bikes:
Posts: 764
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by borobike View Post
I'll probably ride around on the medium setting, one vendor said not to run it on high for more than 5 minutes or it will overheat. My Fenix said the same thing when I got it about the turbo mode. Think it's a valid concern? 600-800 lumens would be pretty sweet but I don't want to burn anything.
Mounting a flashlight on the handlebars of a moving bike is about the best air cooling you could hope for, but that's not a promise that it won't overheat. I had no problems using the turbo mode on my L2D, but multiplying the power like this is something else. I would plan on medium.

After my DX light broke, I wound up getting an L2 host and a dropin instead of trying DX again. It cost me probably $20 more, but I'm much more confident in the build quality, and I know it will be easier to replace parts if it breaks.
CaptainCool is offline   Reply With Quote
Old 05-24-11, 09:22 PM   #12
socalrider
Senior Member
 
socalrider's Avatar
 
Join Date: Mar 2004
Location: Upland, CA
Bikes: Litespeed Liege, Motorola Team Issue Eddy Mercxk, Surly Crosscheck Cyclocross bike, Fisher Supercaliber Mtn. Bike
Posts: 5,002
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Been riding with high power leds for years. No issues with overheating when used for riding.. They barely get warm to the touch when used in this manner. Would be interested in seeing the beam pattern.. The XML lights are very nice and tight compared to the P7's and MCE's.

They give a nice solid hotspot with a little sidespill, just right for bike riding..
socalrider is offline   Reply With Quote
Old 05-24-11, 10:27 PM   #13
davidad
Senior Member
 
Join Date: Feb 2009
Bikes:
Posts: 4,833
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
The 502B doesn't have enough material to heat sink the LED. Something is gonna burn out.
davidad is offline   Reply With Quote
Old 05-24-11, 10:30 PM   #14
davidad
Senior Member
 
Join Date: Feb 2009
Bikes:
Posts: 4,833
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 7 Post(s)
Quote:
Originally Posted by colleen c View Post
Kinda like this


I drill a hole in my DX P7 and mounted it on a mini tripod and 4P cell holder. Made that light a work station light. sure beat the heck out of drop light and extension cord.
I think the module is rated for 4.2 volts. Extra batteries would need to be parallel.
davidad is offline   Reply With Quote
Old 05-25-11, 04:41 AM   #15
rscamp
Senior Member
 
rscamp's Avatar
 
Join Date: Jun 2008
Bikes:
Posts: 251
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by davidad View Post
...Extra batteries would need to be parallel.
Of course.

You can also buy 18650 dummy cells. I can't remember where I got mine...
rscamp is offline   Reply With Quote
Old 05-25-11, 05:40 AM   #16
colleen c
I am a caffine girl
 
colleen c's Avatar
 
Join Date: Nov 2009
Location: Bay Area
Bikes: 2012 Stumpjumper FSR Comp...2010 Scott CR1 CF...2007 Novara FS Float2.0...2009 Specialized Hardrock Disc...2009 Schwinn Le Tour GSr
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by davidad View Post
I think the module is rated for 4.2 volts. Extra batteries would need to be parallel.
I had 4 old Trustfire cell laying around after purchasing all those AW and XPG led flaslight. Had 4 in paralleled and the P7 gave me less than 4 hours runtime. It was ok until Shiningbeam came out with their S Mini which was almost as bright and last almost three hours with a single AW 2900.

I might make another dummy cell for my X Thrower mounted on my bike and do an external battery with those, but with the new XML thrower comming out, I'm not sure is it worth the effort.
colleen c is offline   Reply With Quote
Old 05-25-11, 06:23 AM   #17
Gerry Hull
Banned.
 
Join Date: Jan 2011
Bikes:
Posts: 359
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
If you want three 185650 cells right this minute you can buy a battery pack for a lithium rechargEable drill @ home depot etc. for 38 bucks.

Or you can order them online in any configuration you want, already wired with voltage limiters and such. Just google "18650"

I just love those cells. You can fit them in the seat tube, the head tube and most stems will hold one as well. I like super clean looking light set ups, no brackets or clamps or straps and all that garbage.

I believe Ive seennthen18650 sold singly, recently, in some major retail Big Box, but unfortunately cant remember where it was.
Gerry Hull is offline   Reply With Quote
Old 05-25-11, 07:00 AM   #18
colleen c
I am a caffine girl
 
colleen c's Avatar
 
Join Date: Nov 2009
Location: Bay Area
Bikes: 2012 Stumpjumper FSR Comp...2010 Scott CR1 CF...2007 Novara FS Float2.0...2009 Specialized Hardrock Disc...2009 Schwinn Le Tour GSr
Posts: 1,815
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by socalrider View Post
Been riding with high power leds for years. No issues with overheating when used for riding.. They barely get warm to the touch when used in this manner. Would be interested in seeing the beam pattern.. The XML lights are very nice and tight compared to the P7's and MCE's.

They give a nice solid hotspot with a little sidespill, just right for bike riding..
Batteryjunction might be coming out with a Olight XML 2x18650 900 OTF lumen with a Hi runtime of 110 min. They claim a 800 meter throw??? More of that at CPF.

That's one flashlight I may get. The only XML I got so far is a Magicshine XML. Really nice throw and a good helmet light. Mix that with a flood like my Bikeray IV and I think I found a perfect combo of flood and throw. Only gripe is the XML color tint. I think it's in the low 5000 and in contrast with the 6000k of the BRIV, it's like a slight yellow dot dancing around a field of white light.
colleen c is offline   Reply With Quote
Old 05-25-11, 07:04 AM   #19
ItsJustMe
Seņior Member
 
ItsJustMe's Avatar
 
Join Date: Sep 2005
Location: Michigan
Bikes: Windsor Fens, Giant Seek 0 (2014, Alfine 8 + discs)
Posts: 12,977
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
I picked up one of these for $19, used my existing 18650 stuff. I'm pretty happy with it though I haven't tried it on the road at night yet, only up against a wall compared to my existing lights. It's rated 510 lumens and is probably something like 400. This one is rated 1200 and is probably 550, so they're not actually much different.
__________________
Work: the 8 hours that separates bike rides.
ItsJustMe is offline   Reply With Quote
Old 05-25-11, 07:30 AM   #20
Richard Cranium
Senior Member
 
Richard Cranium's Avatar
 
Join Date: Jun 2002
Location: Deep in the Shawnee Forest
Bikes: LeMond - Gunnar
Posts: 2,825
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
As soon as you have to "mod" the light- the "great deal" flops. But as a pretty neat "eye-ball blinder" to have around -and if it is supplied with a cell and charger, and assuming not defective - then it's an OK deal.

But hey - I just checked Ultrafire's website and there are plenty of neat toys. I'm really happy with my fenix LD-20 - using double AAs will never get you blinding light - but it's damn convenient for "just in case" rides where you just want something that will get you in after sunset.
Richard Cranium is offline   Reply With Quote
Old 05-25-11, 10:28 AM   #21
no motor?
Senior Member
 
no motor?'s Avatar
 
Join Date: Dec 2005
Location: Chicagoland
Bikes: Specialized Hardrock
Posts: 4,867
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 22 Post(s)
Quote:
Originally Posted by borobike View Post
You all raise good points, I'm not very well spoken in LED flashlight technology. Either way I'm sure it will be a lot brighter than the Fenix L2D flashlight that I have. It's been a great flashlight for years but it only puts out around 125 lumens max, and that's in it's "turbo mode". Realistically I can only run it at 80 lumens for any extended period of time.
.
.
.
The L2D would make a good helmet light for you. You may wonder if it's even on when you use it, but it will be good for looking into corners and warning cars approaching from the side. Especially on that day when your newer light isn't working, or you want to look at something that's not in front of the handlebars.
no motor? is offline   Reply With Quote
Old 05-25-11, 10:33 AM   #22
borobike
Dept. store bike bandit
Thread Starter
 
Join Date: May 2011
Bikes:
Posts: 329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Well, I don't know if I'm going to modify it. If I run it on medium the battery should last fine. Most rides are only 1/2-1 hour in length, so even full strength should be fine if I can trust it not to overheat.

I'll be able to get a better judgement of the flashlight's actual output once it gets here using an old lightmeter I have. It's not much for giving actual numbers, but it's good for relative measurements. I know the outputs for my cars' lights (3400 lumens and 3200 lumens, Philips 85122+ and Osram Xenarc 66140 respectively) so I should be able to judge relative brightness.
.
.
.

Last edited by borobike; 05-25-11 at 11:18 AM.
borobike is offline   Reply With Quote
Old 05-25-11, 12:40 PM   #23
Richard Cranium
Senior Member
 
Richard Cranium's Avatar
 
Join Date: Jun 2002
Location: Deep in the Shawnee Forest
Bikes: LeMond - Gunnar
Posts: 2,825
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
I'll be able to get a better judgement of the flashlight's actual output once it gets here using an old lightmeter I have. It's not much for giving actual numbers, but it's good for relative measurements.
Yeah, I think you may be surprised that you don't know how any lights actually work. You misquoted the specs of my LD20 AA.

There really isn't a good way to make a flashlight a "great" bike light. Either you give up power or you give up run time. Oh you can get a good flashlight - but then the shaft is too big and bulky - but hey - its fun to try.
Richard Cranium is offline   Reply With Quote
Old 05-25-11, 01:50 PM   #24
borobike
Dept. store bike bandit
Thread Starter
 
Join Date: May 2011
Bikes:
Posts: 329
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Richard Cranium View Post
Yeah, I think you may be surprised that you don't know how any lights actually work. You misquoted the specs of my LD20 AA.

There really isn't a good way to make a flashlight a "great" bike light. Either you give up power or you give up run time. Oh you can get a good flashlight - but then the shaft is too big and bulky - but hey - its fun to try.
I don't have an LD20, I have an L2D. I make no claims about the specs of your LD20. I do understand that it has higher lumens, however.

Saying that I don't know how any lights actually work is a bit of a stretch. Outside of flashlights I have quite a huge understanding of vehicular lights. My car's lights I mentioned earlier...I built them myself.





(Audi A6 projectors w/Osram Xenarc in a 1997 LeSabre)







Morimoto Mini D2S w/Philips 85122+ in a 1996 S10...

Before the HID projectors I messed around with everything from boosted halogens to HIR and some rudamentary HID systems in modified reflector housings...

The only car I've owned that I haven't built headlights for is our new 2011 Buick Enclave, but that's because it already comes with HID projectors.

But yes, I am somewhat new to LED flashlights, and LEDs in general other than the ones I have wired for entrance lighting, but they are just regular 5mm LED's and not nearly on the same field as those used in serious flashlights.
.
.
.
borobike is offline   Reply With Quote
Old 05-25-11, 02:48 PM   #25
socalrider
Senior Member
 
socalrider's Avatar
 
Join Date: Mar 2004
Location: Upland, CA
Bikes: Litespeed Liege, Motorola Team Issue Eddy Mercxk, Surly Crosscheck Cyclocross bike, Fisher Supercaliber Mtn. Bike
Posts: 5,002
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by ItsJustMe View Post
I picked up one of these for $19, used my existing 18650 stuff. I'm pretty happy with it though I haven't tried it on the road at night yet, only up against a wall compared to my existing lights. It's rated 510 lumens and is probably something like 400. This one is rated 1200 and is probably 550, so they're not actually much different.
I too bought an XML from another HK seller and it is an ideal bike light.. The beam is much tighter than a P7 but still wide enough with a little side spill for bike riding.. I use this in conjunction with my Elektrolumens MCE light and it is a perfect mix of flood and throw..

The XML was touted as 1000 lumens but of course it is closer to 500..
socalrider is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 01:00 PM.