i was looking for circuit board to do my led tails when i stumble upon this crap, it just may work!!!!! i think i might buy one and hook it up to see what it will do or if it looks good!
for the turn signals
http://cgi.ebay.com/ebaymotors/1-AMB...QQcmdZViewItem
for the stop and tails
http://cgi.ebay.com/ebaymotors/1-RED...QQcmdZViewItem
and for the backups
http://cgi.ebay.com/ebaymotors/1-WHI...QQcmdZViewItem

 

IMO the way they are laid out will not look to good inside our tails, turn signals, backups... They would be better if they were straight lines.

 

Yea as many leds i have on my car i wouldnt use something like that. That is to close together to give a led look. Its not that hard to solder leds . I do thousands of them weekly . It takes a lil time.

 

true just throwing an option out there for some, i am still doing my tails myself tho

 

wow... that is garbage.. use ONLY SUPER FLUX LEDS.. dont be cheap.. i learned that the hard way

 

I will say yes and no. Super flux are the best as far as longevity but i have some 5mm leds that outshine my super flux.

 

yea with a 5 degree viewing angle.. i messed around with tons of leds... and from now on im only using the superflux (genuine).. the ones i have in the tail lights are 100 degree view angle.. i see people cringe behind me at a red light.. thats who bright these suckers are..

this pic is with the headlights on.. not the brakes, and the pic was taken at noon

 

what picture?

 

Sig pic.
But i have side by side super flux and 5mm leds you tell me what one is brighter. They are both wired the same.

 

thats subjective.. what kind of Superflux leds did ya use.. cuz like i said u cant directly look at mine cuz they burn ur eyes.

 

hp . The only real super flux man.

 

They changed to Agilent about 8 years ago, now Lumiled, part of Phillips. HP has no more components.

http://www.agilent.com/about/company...tml?cmpid=4491
http://www.lumileds.com/corporate/
http://www.lumileds.com/products/line.cfm?lineId=4

Viewing angle is a real issue since the reflector (inside the LED) design is optimized for viewing angle. Also, the age of the product can also be a factor. They improved the brightness greatly in recent years. If you still have HP LEDs, these must be produced over 8 years ago and may be designed over 10 years ago.

 

yup and i know this man. but us in the led world still call them hp. I have 1500 of these bin matched and can show you proof.

 

Looking at the Superflux datasheets, they are rated for 3.8 lumens. There are 5.0-8.0 lumens LEDs available from Cree. May be more expensive.

 

Whats the viewing angle of those?

 

where did you get your tails? they look awesome? If you did it yourself, is there a tutorial or any write up?

 

12 lumens for 15 deg and 5.1 lumens for 30 deg.

http://www.cree.com/products/ledlamps_hb5round.htm

 

Yea those are very narrow leds man. And if they are more i wouldnt waste my money.

 

Yes, exactly what f550 was saying. From your picture, it is not clear what the viewing angle was.

 

The super flux have 100 degree viewing angle while the 5mm have 45 degree.

 

May be that's why the 5mms look brighter in your pix.

 

no. With 100 degree angle itll be wider where as the 45 would be narrow. The 5 mm were at a n angle not head on so that should have taken away from the brightness . But that didnt happen

 

Still brighter if you move your camera to let's say, 40 deg off center?

Look at fig 6 on page 3 of the Cree datasheet:
http://www.cree.com/products/pdf/LED...-30Q-A(11).pdf

and Superflux datasheet page 7
http://www.lumileds.com/pdfs/DS05.pdf

Comparing the two specs, it is clear that Lumileds engineers designed the Superflux to have wide angle. So likely you will notice the difference once your camera past let's say 30 deg off center.

The total light output of the LED is the size of the area under the curve. In math terms, the integral of the curve. Power efficiency is the area under the curve divided by the current the device consumes. This is also important for a good design.

Getting back to the subject, the view angle requirements for tail light is probably wide to give good visibility. For rear fogs or stop lights probably a narrow beam but brighter is better. So use the 5mm for stoplights and the Superflux for taillights.

For designers, they would also have to consider thermal issues. Osram has some 1 Amp LEDs (12-15 watts) but it looks like they have some tougher heat sinking requirements. Taillights and fog lights would need long life and low thermal output. Stoplights can be low duty cycle and higher thermal output should be ok.

 

Um I dont know if you looked at the pic but neither one was on center but ok. I have been doing retros for a couple years now. I would never use 5mm in a taillight retro hands down. For other lighting i will start looking at 5mm. Not the cree not worth the money they want seeing i can get 1000 5mm for 50 bucks.