modern lights

Just different types/sizes/fittings of Halogen bulbs, aren't they?  H4 is the type with a main and dip in the same bulb (not very good solution), the others are usually single filament.
 
When i mountet SFC firing and light there was H2 bulbe wich was bad light , an car electric told me to buy H5 wich is H2 metal part and H4 bulbe , sice than light is very good .
 
Some halogen lights are 'overdriven' and burn brighter- certain Philips ones f'rinstance.  But they don't last as long.  I bet the size and therefore positioning and focal properties of the light and bulb combination come into play.
 
henry said:
can anyone explain to me the differences with all these various light categories, eg H3, H7, etc., etc.
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Thieved off Tinternet:

"Single filament. In 55W and 100W versions:
  • H1 axial filament, older style base
  • H2 axial filament
  • H3 transverse filament, heat-resistant cable for "hot" lead.
Dual filament. 55W to 100W low beam, high beam 60W to 130W:
  • H4
  • H5, similar to H4 but has larger connector
  • H7

More than you ever wanted to know  :D here, for example:
http://en.wikipedia.org/wiki/Automotive_lamp_types

(Wonder whatever happened to H6 ...?)

Ciao

Craig
 
Craig,

Don't want to be a smart arse (once :D) again, but, H7 is single filament, usually 55W.  Used in most modern car headlights up to around 2008, still in use here and there.....  100W examples are meant for sporting events, eg. rallying, and usually do not carry DOT/T?V approval.
H11, etc, are derivatives of H7 having specific plug connections instead of the more common spade connectors.

No H6 to my knowledge...

piet
 
As other have said the H number is purely the bulb type/mounting layout/filament layout and has no direct relationship to the wattage or even the voltage necessarily, eg H4 seems to be the common bulb type in the Lavs and is available in various wattages. I seem to remember these in my 1956 VW beetle at 6V, no idea the wattage but they were like candles until they were uprated and relays fitted. They are also in my Landcruiser of 2000 year, the BMW and of course the RGS.
 
Drikko,

I had a '56 Beetle as well and even after 30 years since I owned the car I'm very sure that it did not have Halogen headlight bulbs! Ran the sucker with highbeam all the time at night, gave the non synchro-mesh gearbox a hard time (o.k first was synchronised) and dreaded the crossply tires.

Air-cooled VW's suck!

Gerald
 
Gerald said:
Air-cooled VW's suck!
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They have to suck or they'd overheat!!

You are right they weren't Halogen, they were standard filament bulb, but I thought they were still the H4 mounting layout but I might be wrong. I remember fitting 6V H4 halogen bulbs and relays and all was bright again. perhaps the reflectors had to be changed as well to accommodate the H4s. There's been a few ales between then and now so memory of this is a bit dim.......
 
My son's Yamaha 50 scooter (sadly, probably written off now) has an H35 bulb, which as far as I can see is a low wattage (35W) H4. For a bike that will only do 80kph (down a mineshaft) it's great, excellent reflector. I put a 55W H4 in to see what difference it would make, really couldn't see any difference in brightness. But some of the wires started to get very hot.

Ken
 
Gerald said:
Drikko,

I had a '56 Beetle as well and even after 30 years since I owned the car I'm very sure that it did not have Halogen headlight bulbs! Ran the sucker with highbeam all the time at night, gave the non synchro-mesh gearbox a hard time (o.k first was synchronised) and dreaded the crossply tires.

Air-cooled VW's suck!

Gerald
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I had a 6 Volt 1966 VW Beetle - I had to put my face right up to the lens to see if the lights were on and spot a little yellow glow. I wish I had known about relays at the time.
 
The other fun thing about these was the placing of the battery under the back seat, if you didn't put the steel cover back on it and you put an overweight person on the seat it would short out the battery and set fire to the horse hair stuffing engulfing the passenger in smoke!. Never seen a fat man extricate himself out of a 2 door car so fast hahahaha :D :D :D He refused to get back in after we extinguished the flames so we drove to the pub while he walked with his burned arse. Probably did him some good actually, except perhaps for the psychological damage from us paying out on him for hours..... :D 
 
sfcpiet said:
Don't want to be a smart arse (once :D) again, but, H7 is single filament, usually 55W. 
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No worries, Piet.  We LIKE smart arses here :D  :-*.

(And just further proof not to believe everything you read on Tinternet ...)

Ciao

Craig
 
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