Quick question motoring people.
We have a 2007 Passat (B6 I think as it has circular tail lights). The dipped beams are quite weak even after changing the bulbs. Tried Philips Xtreme Vision and Osram Nightbreakers and none of them gave improvements.
Now I think that car has projector type headlight as it has this circular thing surrounding the bulb. Will it be legal and safe to buy an H7 LED bulb to fit?
The LED kit I am looking at is
https://www.aurorabulbs.com/collect...s-g7-led-4000-lumens-headlight-conversion-kit
Thanks
Bull**** product with bull**** specifications.
They claim 4000lm but have only 4 Luxeon Z ES LEDs on the product. The Luxeon Z ES has a typical output of 245lm @ 700mA, or even if you get the BEST bin (which you won't) it's 290lm / LED. Bit of maths suggests that this equates to just 1160lm / bulb. "Ah, bu you can drive them harder" I hear you say. Well, yes you can. At maximum current they will produce 450lm, so 4 x 450lm = 1800lm. Still a long way of the 4000lm they claim. Maybe there are 8 LEDs (and we can't see the 4 on the other side). OK, that's 3600lm then, but that assumes optimal operating conditions, which I can guarantee you now will not be the case with these junk things or that design.
They claim 25W power consumption. 4000lm @ 25W = 160lm/W. LumiLEDs own data sheet says it's only 125lm/W for the LED itself, at 85 degrees C & 700mA (that's the 245lm output level). At maximum power (1200mA) the efficacy drops to just 113lm/W. This also does not take into account the thermal & optical losses of this design.
Finally, that heat sink is nowhere near big enough to dissipate 25W in an automotive application (it's probably only borderline big enough to dissipate 25W in a free ambient air situation but not without the LEDs running hotter than the rated values are calculated at, which will further reduce light output and dramatically impact on lifetime).
At the VERY best, these bulbs will deliver maybe 3000lm each at ~30W, and that assumes there are 4 LEDs each side, not just 4 on one side.
I would also wager that the only thing Philips have to do with these is the supply of the LEDs themselves.
Avoid.