stu1969
Registered user
What are people's views?
I'm looking for some reasonably priced DIY lights that will light up the world
I'm looking for some reasonably priced DIY lights that will light up the world
What are people's views?
I'm looking for some reasonably priced DIY lights that will light up the world

Hella FF50 spots with 50w HID conversions![]()
Hella FF50 spots with 50w HID conversions![]()
Beware LED spotlights ;-) The eye's night vision is most sensitive around 500nm unfortunately this is where most white LED's have a big 'hole' in there spectrum.
I am sure this will start an argument![]()

FF50's without the conversion arent too shabby either. Excellent reflectors hence people like them for conversions.
Still peddling your inaccuracies?![]()
FF50's without the conversion arent too shabby either. Excellent reflectors hence people like them for conversions.
It is not an inaccuracy, most not all white LEDs have a very low output at 500nm and this is where the eye is most sensitive to night vision. So if the headlight produces very little output around 500nm (blue/green/cyan) then it will be harder to see objects at night, HOWEVER as the eye is very sensitive in this region then too much light directly into the eye will cause saturation and temporary blindness.
Another downside to consider is the very fast 'risetime' of bright white LEDs - this has the potential do dazzle other road users because the eye doesn't have time to adjust to the rapid rise in brightness when flashed.
I am not knocking LEDS just pointing out their potential downsides.


Is this a big hole? For a Cree XML-T6. Is this good or bad?![]()
http://www.cree.com/led-components-...d Modules/XLamp/Data and Binning/XLampXML.pdf
in the 'REAL WORLD'the current LED lights are way better than Halogen.
There may be a theoretical gap in the spectrum in some makes and models, but A) nobody in 'the real world' has actually commented on it or will notice it objectively and B) the effective lumens per watt produced exceeds any other form of lighting available for a motor vehicle.
Add to that the size, ease of use and decreasing price of LED technology and it's a bit of a no brainer......no wonder Audi, BMW, Land Rover, Lexus, Ferrari and nearly every other car manufacturer, closely followed by Bike manufacturer are all going LED.

I disagree - it is far from a no brainer, fashion and marketing has a lot to answer for - lumens/per watt is irrelevant in the automotive world, the energy saving compared to the inefficiencies of the internal combustion engine pale into insignificance.
Efficiency is only relevant to static lighting, in buildings for example, where LEDs have a huge advantage.
Car manufacturers are always looking for new selling points and realise just how gullible and fickle customers are - if they can get sales through selling bling they will do it in order to get an advantage over their competitors.
As far as price goes LEDs currently are at a huge premium compared to normal bulbs - try getting a quote for your failed Audi headlight!!!!! don't tell me that LEDs don't fail, ideally they should last for ages but they do fail.
P.S. when I first commented on LEDs in another thread I had no idea that you sold the things - if I had I would have charged you for all this publicity that you are getting free of charge!![]()


