weird60625

1000 LM (Luminous flux) ? is it close to headligh brightness ?

quakerroatmeal

iTrader: (3)

Here's some info I found.

And a comparison of Kelvin to lumens;
Standard OEM halogen 55W 9006(HB4) = 1100lm (lumens)

4300k D2S Philips = 3200lm (lumens)
4300k D2R Philips = 2800lm (lumens)
4300k D2S Philips = 2400lm (lumens) actually 5800k
4300k D2R Philips = 2000lm (lumens) actually 5800k
4800k D4S/R (brand) = 3800 (lumens) ** brightest in the market
5800k D4S/R (brand) = 3300 (lumens)
7000k D2S other = 1790lm (lumens) *(other bulb brand)
7000k D2R other = 1390lm (lumens) *(other bulb brand)
8000k D2S other = 1180lm (lumens) *(other bulb brand)
8000k D2R other = 780lm (lumens) *(other bulb brand)

Higher than 8000k, the light output significantly drops off, causing the light to be almost useless.

One should point out that although light output drops off after 8000k, the fact that the light is in the blue-purple spectrum, it still puts a major strain on the eyes of others.