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.

Reply
 
Thread Tools Search this Thread
Old 01-22-13, 10:43 PM   #1
jyl
Senior Member
Thread Starter
 
jyl's Avatar
 
Join Date: Aug 2006
Location: Portland OR
Bikes: 61 Bianchi Specialissima 71 Peugeot G50 7? P'geot PX10 74 Raleigh GranSport 75 P'geot UO8 78? Raleigh Team Pro 82 P'geot PSV 86 P'geot PX 91 Bridgestone MB0 92 B'stone XO1 97 Rans VRex 92 Cannondale R1000 94 B'stone MB5 97 Vitus 997
Posts: 6,912
Convert Nightsun To LED?

I've got a set of Nightsun Team Issue dual halogen lights on my mountain bike. If you don't remember these, they were the cat's meow for powerful, rugged rechargeable bike lights - 20 years ago.

Today, they are still pretty bright, but not very bright; the beam pattern is too diffuse; and the color of the light is much yellower than we're used to.

They are like this: http://www.night-sun.com/htmldocs/team_issue.html

The battery is 12v. One bulb is 10 watts, the other is 20 watts. They are two-pin halogen bulbs with reflectors. They look like

http://www.lickbike.com/productpage....-20'<br />

My question is, can I convert these to LED? Find a powerful LED that will fit in the housing? How would you approach this, if you had a mad hankering to tinker?

The reason why I don't simply dump the old Nightsun, is because it looks correct with the bike, which is an early '90's machine. I like the retro vibe.

Last edited by jyl; 01-22-13 at 10:50 PM.
jyl is offline   Reply With Quote
Old 01-23-13, 12:40 AM   #2
unterhausen
Randomhead
 
Join Date: Aug 2008
Location: Happy Valley, Pennsylvania
Bikes:
Posts: 14,483
my experience is that these housing don't really have enough heat sinking for a power led. You would need to either modify the reflector to put a hole in it, which isn't easy, or find a reflector and make it fit. There are some 35 mm reflectors that might fit. There are various forums for building lights. I frequent many of those forums, and I haven't seen a project like this in recent memory.
unterhausen is offline   Reply With Quote
Old 01-23-13, 08:11 AM   #3
Mark Kelly 
Senior Member
 
Mark Kelly's Avatar
 
Join Date: Oct 2009
Location: Willy, VIC
Bikes:
Posts: 637
Quote:
Originally Posted by jyl View Post
One bulb is 10 watts, the other is 20 watts. They are two-pin halogen bulbs with reflectors. They look like
They are called MR16 = M(ultifaceted) R(eflector) 16 (x 1/8th inch diameter)*.

A 20W MR16 halogen produces about 250 - 300 lumens, a 5W LED will give you more light (but not necessarily more illumination). Althought the 5W LED naturally produces less heat due to the higher efficiency, as Unterhausen says they can still have thermal issues because they can't handle anything like the same temperatures.

Google "Cree XP-G MR16" to see what's available in your area.

*This teminology dates all the way back to the days of valves (vacuum tubes to Septics) which had envelopes specified the same way - common small ones like the 6SN7GT came in a T-9 envelope = T(ubular), 9/8".

Last edited by Mark Kelly; 01-23-13 at 08:25 AM.
Mark Kelly is offline   Reply With Quote
Old 01-23-13, 12:14 PM   #4
Looigi
Senior Member
 
Looigi's Avatar
 
Join Date: Dec 2010
Bikes:
Posts: 8,943
A tungsten lamp produces light because the filament glows from being so freakin' hot. Heat is fundamental to the process.

An LED produces light in an entirely different way, to which heat is counterproductive.
Looigi is offline   Reply With Quote
Old 01-23-13, 12:54 PM   #5
seeker333
__________
 
seeker333's Avatar
 
Join Date: Feb 2004
Bikes: yes!
Posts: 3,113
OP, it's not worth the trouble - conversion parts cost more than you can buy new. I retired my very well used Marwi Night Pro 20w+15w dual MR11 bike light 4 years ago, due to obsolescence from maturing LED technology.

You can get an official Magicshine 808 from the largest US seller with latest generation emitter for $85, and a clone for less.

http://www.action-led-lights.com/col...men-bike-light
seeker333 is offline   Reply With Quote
Old 01-23-13, 04:30 PM   #6
jyl
Senior Member
Thread Starter
 
jyl's Avatar
 
Join Date: Aug 2006
Location: Portland OR
Bikes: 61 Bianchi Specialissima 71 Peugeot G50 7? P'geot PX10 74 Raleigh GranSport 75 P'geot UO8 78? Raleigh Team Pro 82 P'geot PSV 86 P'geot PX 91 Bridgestone MB0 92 B'stone XO1 97 Rans VRex 92 Cannondale R1000 94 B'stone MB5 97 Vitus 997
Posts: 6,912
Thanks, guys. I will look around.

I know I could buy a better light brand new for $50. It's the retro look I'm trying to keep, if possible.
jyl is offline   Reply With Quote
Old 12-15-15, 07:56 PM   #7
mluczkow
Newbie
 
Join Date: Dec 2015
Bikes:
Posts: 4
[video=youtube;0fK_FDkyCzc]https://www.youtube.com/watch?v=0fK_FDkyCzc[/video]

Those are mine. I love them. I've got 5 sets that I've put together from ebay, 4 of which even have the law enforcement only "wig wag" controller.

Cheers!
mluczkow is offline   Reply With Quote
Old 12-16-15, 12:01 PM   #8
noglider 
aka Tom Reingold
 
noglider's Avatar
 
Join Date: Jan 2009
Location: West Village, New York City
Bikes: too many
Posts: 26,636
Quote:
Originally Posted by mluczkow View Post
[video=youtube;0fK_FDkyCzc]Those are mine. I love them. I've got 5 sets that I've put together from ebay, 4 of which even have the law enforcement only "wig wag" controller.

Cheers!
Impersonating a law enforcement officer doesn't trouble you?
__________________
Quote:
Originally Posted by noglider
Please email me rather than PM'ing me. Thanks.
Tom Reingold, noglider@pobox.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
noglider is offline   Reply With Quote
Old 12-16-15, 04:17 PM   #9
mluczkow
Newbie
 
Join Date: Dec 2015
Bikes:
Posts: 4
Quote:
Originally Posted by noglider View Post
Impersonating a law enforcement officer doesn't trouble you?
I live in Japan, so no.

These aren't even the colors used for LE.
mluczkow is offline   Reply With Quote
Old 12-16-15, 04:29 PM   #10
noglider 
aka Tom Reingold
 
noglider's Avatar
 
Join Date: Jan 2009
Location: West Village, New York City
Bikes: too many
Posts: 26,636
Ah, thank you. I bought spoke lights from a Chinese web site, and it turned out they flashed blue and red. An oncoming car pulled over to the side of the road. I decided not to run those lights any more.
__________________
Quote:
Originally Posted by noglider
Please email me rather than PM'ing me. Thanks.
Tom Reingold, noglider@pobox.com
New York City and High Falls, NY
Blogs: The Experienced Cyclist; noglider's ride blog
noglider is offline   Reply With Quote
Old 12-18-15, 01:40 PM   #11
fietsbob 
coprolite
 
fietsbob's Avatar
 
Join Date: Jun 2010
Location: NW,Oregon Coast
Bikes: 7
Posts: 18,086
The Bright LED's are attached to Heat Sinks , now Too .
fietsbob 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 09:54 PM.