Philips 12972XV+S2 X-tremeVision Halogen Headlamp H7 - set of 2 £16.85 @ Amazon UK
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Philips 12972XV+S2 X-tremeVision Halogen Headlamp H7 - set of 2 £16.85 @ Amazon UK

8
Found 13th Apr 2015
My Light just went on my car (2010 Vauxhall Corsa) and wanted to replace them with a brighter bulb. Looking around and these seem pretty good, good reviews and seems to be alot brighter than normal. THis is the cheapest I have found them and thought I would give it a go!

8 Comments

Good bulbs but I find bulbs like these don't last long

Thats right,they dont latst long. Get the 60% brighter onces.

Banned

These extreme lights are all mostly just 'whiter' lights that trick your eyes into thinking they are brighter than they are. You can't get 60% brighter from the same wattage, it's just marketing rubbish. If you could do that then everyone would do it.

If you want brighter, get the Osram 65w lights. Won't give you a "cool" white or blue glow, but are noticeably fuller beams than normal.

Original Poster

MTBPhil

These extreme lights are all mostly just 'whiter' lights that trick your … These extreme lights are all mostly just 'whiter' lights that trick your eyes into thinking they are brighter than they are. You can't get 60% brighter from the same wattage, it's just marketing rubbish. If you could do that then everyone would do it.If you want brighter, get the Osram 65w lights. Won't give you a "cool" white or blue glow, but are noticeably fuller beams than normal.



Thanks for the advice. Are these the ones you are referring to?

autobulbsdirect.co.uk/H7-…car
Edited by: "darthvader666uk" 13th Apr 2015

Auto Express test winner. Best price I've seen. Heat added

I have moved away from osram night breakers as they don't last very long at all, my car does 6k miles a year day and night driving. I have opted for the Phillips long life ones here.

amazon.co.uk/Phi…GOQ

Not voted either way as I have just had to change the "improved lifespan" gold night breakers and its too early to tell.
Edited by: "sanchez82" 13th Apr 2015

MTBPhil

These extreme lights are all mostly just 'whiter' lights that trick your … These extreme lights are all mostly just 'whiter' lights that trick your eyes into thinking they are brighter than they are. You can't get 60% brighter from the same wattage, it's just marketing rubbish. If you could do that then everyone would do it.If you want brighter, get the Osram 65w lights. Won't give you a "cool" white or blue glow, but are noticeably fuller beams than normal.



​I'm sorry but you can get more light out of the same wattage. The power rating is based on the electricity used, filament bulbs are very inefficient at making light from electricity (3-5%) and in fact waste most of it as heat. Therefore a bulb rated at 55W will probably only use 2.5-3W of that energy to generate useable light, the rest is wasted as heat.
With careful filament design and different gases in the bulb itself you can make the bulb more efficient at turning the electricity into light, i.e. generate less heat. There are examples of this in domestic lights where halogen equivalents of standard bayonet GLS bulbs use only 42W to give the equivalent light output of a 55W bulb. MIT boffins have even found ways of getting filament bulbs to almost 40% efficiency, that is even better than LEDs which are about 14%, although it's early stages in the lab.
That is not to say however that there isn't an element of marketing bull droppings as well, especially with the blue tinting to appeal to certain sectors of the driving community.
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