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Old 06-10-08, 11:07 AM   #1
jsigone
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anyone use a new P7 flashlight yet?

I just placed my order from DX for mine, 700-900 lumens for $45 + bats and charger. Was wondering if anyone is using them already.

http://www.dealextreme.com/details.dx/sku.13060
55-60 minute runtime on high with a 18650 battery

Here's some shots I found on CPF







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Old 06-10-08, 02:24 PM   #2
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I'm waiting for optics. The only thing available now is a flashlight reflector, and thats getting poor reviews because its a standard reflector they machine a little to fit the P7. As soon as a 10X20 or 15X30 becomes available I'll be all over it.
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Old 06-25-08, 01:29 PM   #3
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I got my light in yesturday. Went for a short 15 minute spin around the naborhood bout 10pm last night. I'm VERY VERY impressed on how much light this thing produces. It has alot of flood and good throw to it as well. This will be perfect for MTB rides, the beam pattern is simular to my friends HID trail rat. Unlike the Felix L2D, where the hotspot is about 4ft wide thrown at 20-25ft and the spill is about 8-10ft wide. The MTE P7 light doens't really have a hot spot, but the lighted area is larger then the splill of a L2D but BRIGHT. I can light entire house from 80-100ft away AWESOME. The slow strobe is nice, I can use that at dusk before it gets dark. I'll try to get out tonight again but with a camera in hand. This thing is AWESOME. I'll also need to test the run times of the bats on both High, Med and strobe as those will be the settings I'll be using the most. The low setting is like a old AAA mag light. Th fast strobe is just too fast, SOS is just that. The Police tactical strobe is a series of fast strobs with a pause. I might find a time to use this over running striaght low strobe mode.
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Old 06-25-08, 07:32 PM   #4
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what are the burn times on other modes.. It claims 60 minutes on high.. I am more interested in something that gives me 2-3 hours of burn time with at least 300-400 lumens.
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Old 06-25-08, 07:43 PM   #5
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With that light on strobe mode cars could not say that they did not see you.

Even in bright sunlight that would be very attention getting.

I have a 200 lumen Cree Q5 flashlight on my helmet, I can't imagine the brightness of the 900 lumen one.
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Old 06-25-08, 08:12 PM   #6
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No joke...I have a little Dorcy tactical light that's 120 lumens and it is reeaaaaaaaaaaally bright. I can't imagine the 900 lumen one either...is that right? Wonder if there's a difference in the way it's measured or something cuz, if my light was 9X brighter than it is, it would kill someone...

Last edited by rmp5s; 06-25-08 at 08:51 PM.
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Old 06-26-08, 12:24 AM   #7
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From what I've read on CPF the true output of that light is in the 350-400 lumen range. That being said, it's a damn bright light for the money. Now only if runtime was longer.....

BTW, one of the Chinese makers is deigning a P7 long runtime bike specific light. Info here: http://www.cpfmarketplace.com/mp/sho...d.php?t=176719
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Old 06-26-08, 12:59 PM   #8
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Originally Posted by socalrider View Post
what are the burn times on other modes.. It claims 60 minutes on high.. I am more interested in something that gives me 2-3 hours of burn time with at least 300-400 lumens.
I didn't get to ride last night, got stuck playing the new Battlefield Bad Company with my brother who is on leave from Iraq.

I'm gonna head out for a ride tonight about 7. Plan to run a new battery off on Med mode. My batteries have been charged to 4.0volts. Takes forever with that cheap $10 charger I got. Appartently it will overcharge the batteries up to 4.24volts, but not sure how long it take to get that extra 1/4volt out of that sucker.

When I got the light, I took it apart. The LED was wired with some thin 22-24 gauge wire to the PCB board. I changed the wire out for some 18 gauge. When removing the driver board, I noticed it was a newer version then I saw on previous post of CPF. They took out the parallel resistors pack for a diode looking chip. I noticed the difference after I rewired the LED. I havn't been able to get a amp reading off the light, can't figure out how that works yet. They say the P7 need 2.8amps to run full 900lumens, but this is a C bin so 700-800lumen LED. I'm assuming they changed the design of the driver board to stay closer to specs, But I can't comfirm that yet. Even if it draws 2.0amp @ 3.6v battery, that's 7.2watt LED headlight. Same 2amps on overcharged 4.2 battery is 8.4watts of power. Now if it was closer to spec, lets say 2.7amps @ 3.6v battery = 9.7watts. same amps of 2.7 @ overcharged 4.2v battery is 11.3watts of power.

When I ordered the light, I was looking for a dual L2D setup, so 380 combine lumen off those two lights in turbo mode. That setup would have been about $160 shipped. I'd be happy to have that combined power coming off a single unit and I believe this lil light produces MORE light then 2 L2D would and at only $70 total for the light, bats, chargers and mounts. I'm not a light expert so i can't comment on the technical stuff. But I'm more into riding and speed & I want to find the limits of this light both on and off the road
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Old 06-27-08, 01:02 AM   #9
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I went out for a 40 mile ride earlier but started about 6:30, didn't get home til almost 9:30pm But damn it was fun testing out the new light. I can cruise at 18-20MPH with the slow strobe which gives high power burst. The faster strobe is nice with Med mode lighting but I fear it might cause bad things for on coming cars. The Med mode is great for climbing at slow speeds or more city lighting where you don't need 100% of the light. High mode was simply awesome. I tried to out run this light and couldn't on the flats. I got it close to 30mph on the flats and still had more room for speed. I went downhill I normally do at 32-35mph and did it at normal speed with this light:clap:

now for the pictures
Medium mode

High mode



bush about 15ft away.
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Old 06-27-08, 01:56 AM   #10
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^^^

What's the runtime on med and high?
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Old 06-27-08, 03:00 PM   #11
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Run time test results so far
Max charged battery is 4.24v so they say
I charged it to 4.10v cuz I got tired of waiting and wanted some type results before I head home.
High Mode: 1h10min before it dimmed, ran another 20 minutes before it dimmed again. End of test. With a fully charged 4.2 bat it should go longer. Battery at the end of the test was 3.42v

My second battery isn't charged yet, its reading 3.8v, so still a ways to go. I'll have to do another test later tonight. This charger blows. I might need to get another pair of batteries($10) rather then invest in a better charger($60-100). Seems like it's going to take a full 24hrs to charge 2 batteries. It charges one at a time.
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Old 06-30-08, 01:30 PM   #12
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so I got the final results of MED mode of this light.

Battery started at 4.22v
2 hours @ 3.87v
3 hours @ 3.82v
3.5hours @3.79v
4 hours @3.76v
4.5 hours @3.75v
5 hours @ 3.74v
5.5 hours @ 3.72v
6 hours @ 3.70v
6.5 hours @ 3.67v
7 hours @ 3.35v and was a little bit dimmer. And could go longer..

I'm waiting for the batteries to charge up and try the strobe soon using this same test method.
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Old 06-30-08, 10:02 PM   #13
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What bike mount are you using with this light? It looks too beefy for the Fenix bike mount.
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Old 06-30-08, 10:31 PM   #14
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Originally Posted by jsigone View Post
so I got the final results of MED mode of this light.

Battery started at 4.22v
2 hours @ 3.87v
3 hours @ 3.82v
3.5hours @3.79v
4 hours @3.76v
4.5 hours @3.75v
5 hours @ 3.74v
5.5 hours @ 3.72v
6 hours @ 3.70v
6.5 hours @ 3.67v
7 hours @ 3.35v and was a little bit dimmer. And could go longer..

I'm waiting for the batteries to charge up and try the strobe soon using this same test method.
At what voltage does the light start to dim? Also, what is the real life lumens count on medium? Any idea?
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Old 06-30-08, 11:04 PM   #15
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Dimmed at the 7 hr mark but even then it could have still ran for a bit longer. It's hard to tell how much the light degrades through the voltage drop without a light meter. Not gonna spend 50+ bucks for a meter to test a light that was only $45. So next best thing for me is to check the voltage of the battery at set intervals.

I based my math off of the new Fenix TK11 using a Q5 LED at 225lumens max for 90 minutes or 12 hours @ 60 lumens. Using that info I estimate 338 lumens coming off this light. I got that number from the runtime at 60 lumens over the 12 hours, plugged in my 7 hours to figure out X is (what a single LED produced) x the cluster of 4.

X= 84.6lumens per LED x 4= 338.4 combine lumens - efficancy of the reflector which is unknown.

So Med mode is around 1/3 of total possible power output.
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Old 06-30-08, 11:15 PM   #16
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While certainly bright, the consensus of the folks at CPF is that the light is nowhere near 900 lumens. More like 600 on high.

http://candlepowerforums.com/vb/showthread.php?t=195228

http://www.candlepowerforums.com/vb/...d.php?t=196364

http://www.candlepowerforums.com/vb/...d.php?t=195805


EDIT: A search through CPF also shows a runtime on medium at about 2 hours. It doesn't make sense that high would have a one hour runtime and medium (50%, no?) would have a seven hour runtime.

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Old 07-01-08, 12:57 AM   #17
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I think it's rated at 900 at the LED - whatever is lost in the reflector. So if they are getting arounf 500-600 then it's not a very good reflector design.

Honestly I was very surprised it lasted that long on Med, since I read the same thing on there.
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Old 07-01-08, 07:03 AM   #18
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I think it's rated at 900 at the LED - whatever is lost in the reflector. So if they are getting arounf 500-600 then it's not a very good reflector design.

Honestly I was very surprised it lasted that long on Med, since I read the same thing on there.
Are you sure you had it on medium? The math just doesn't compute.
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Old 07-01-08, 12:05 PM   #19
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Try looking up the spec sheet for the SSC P7 LED. I think that it's rated 540-700 lumens at 2800ma.
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Old 07-01-08, 12:43 PM   #20
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Are you sure you had it on medium? The math just doesn't compute.
From the pics, it looks like medium is a lot less than 50% of high.
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Old 07-01-08, 03:06 PM   #21
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Are you sure you had it on medium? The math just doesn't compute.
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Old 07-01-08, 10:07 PM   #22
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What's so funny about that? Of all the reviews I've read of this light your results are unique, with all the others in the same ballpark.
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Old 07-01-08, 11:54 PM   #23
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yah I'm sure it was on med, second highest power output on this torch lasted 7+ hours. Ran in front of a fan never got warm/hot (would simulate me riding with it on).
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Old 07-02-08, 04:42 AM   #24
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yah I'm sure it was on med, second highest power output on this torch lasted 7+ hours. Ran in front of a fan never got warm/hot (would simulate me riding with it on).
Assuming that it puts out 650 lumens for an hour on high, and you get 7 hours on medium, we can assume that medium is around a paltry 90 lumens, which is worthless for riding with.
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Old 07-04-08, 06:40 PM   #25
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I think with all the advances with LED's we will see some of the mainstream vendors using the P7 leds in the future.. I would like to see a dual P7 that can put down 1000+ lumens on high and can go down to 500 lumens for a lower mode.. Couple that with a good lithium battery pack and it will outshine anything we have on the market right now..

I have a Trinewt and it compares to my Arc HID light, but led's seem much more pleasing to the eye for night riding..

As far as the P7 light goes, I would like to see a true medium mode that can put out at least 300 lumens and can run for 3+ hours..
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