72 GMC single lamp dual beam headlights - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Glennerd · 08-25-2011, 05:42 PM

Does anyone know of a headlight that will fit and offers both high and low beam? I want to build a cold air intake that will use the inner or high beam location of my headlights. (similar to the ford thun

derbolt). Thank you.

463 · 08-25-2011, 06:51 PM

your low beam is a dual element bulb and will work as you are wanting it to but with reduced light output on the road. chev used a two single 7 1/4in duel element bulbs and gm used the four bulbs in a 5 1/4 in

Glennerd · 10-05-2011, 08:13 PM

So far, so good.

Mike C · 10-05-2011, 08:25 PM

You can get small diameter dual filament bulbs form European suppliers. Cibie makes them, and Hella probably does, too. Make sure you get right hand drive ones! The reflectors internally are different for L or R hand drive. I've seen this come up with guys who have WWII MB jeeps who are looking for 12v lights. You also may be able to find some motorcycle lights which is what my MB has in it.

Glennerd · 10-05-2011, 08:54 PM

Cool. Been wondering if bike lights would work. The web kept sending me to motorcycle sites when I was looking for lights. Seems some Harley lamps may work, but I won't pay for that name on a light anytime soon, lol

**Stocker** · 10-05-2011, 09:18 PM

Here's just one supplier.... Google will probably find more. http://www.rallylights.com/detail.aspx?ID=351

Glennerd · 10-05-2011, 09:57 PM

Thanks, Stocker. A buddy of mine was suggesting going with a bulbless lamp and using an HID system for max lighting. This looks as if it will do the trick. Awesome!

**Stocker** · 10-05-2011, 11:25 PM

Looking at that link, it appears to be a sealed-beam lamp. Not what I had in mind (sorry) -- I didn't think Hella even made those....

That site does carry E-code lamps, though, and that's what I would choose over sealed-beam any day.
This looks like the right ones: http://www.rallylights.com/detail.aspx?ID=733 I have not found a need for higher-wattage (and more costly) bulbs. The 5006A - 60/55W Hella bulbs (H4) work very well.

You could call 'em for more info.... I've dealt with them before, they're very helpful.

If you want a true bi-xenon HID, I think you'll end up paying quite a bit more. That's something I've never really looked into, though.

08-25-2011, 05:42 PM	#1
Glennerd Registered User Join Date: Mar 2011 Location: Vancouver British Columbia Posts: 170	72 GMC single lamp dual beam headlights Does anyone know of a headlight that will fit and offers both high and low beam? I want to build a cold air intake that will use the inner or high beam location of my headlights. (similar to the ford thunderbolt). Thank you.

08-25-2011, 06:51 PM	#2
463 Registered User Join Date: Nov 2007 Location: Sask Canada Posts: 1,666	Re: 72 GMC single lamp dual beam headlights your low beam is a dual element bulb and will work as you are wanting it to but with reduced light output on the road. chev used a two single 7 1/4in duel element bulbs and gm used the four bulbs in a 5 1/4 in __________________ Trueman

10-05-2011, 08:13 PM	#3
Glennerd Registered User Join Date: Mar 2011 Location: Vancouver British Columbia Posts: 170	Re: 72 GMC single lamp dual beam headlights So far, so good. Attached Images

10-05-2011, 08:25 PM	#4
Mike C Registered User Join Date: Dec 1999 Location: Austin, TX, USA Posts: 7,714	Re: 72 GMC single lamp dual beam headlights You can get small diameter dual filament bulbs form European suppliers. Cibie makes them, and Hella probably does, too. Make sure you get right hand drive ones! The reflectors internally are different for L or R hand drive. I've seen this come up with guys who have WWII MB jeeps who are looking for 12v lights. You also may be able to find some motorcycle lights which is what my MB has in it. __________________ 44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax

10-05-2011, 08:54 PM	#5
Glennerd Registered User Join Date: Mar 2011 Location: Vancouver British Columbia Posts: 170	Re: 72 GMC single lamp dual beam headlights Cool. Been wondering if bike lights would work. The web kept sending me to motorcycle sites when I was looking for lights. Seems some Harley lamps may work, but I won't pay for that name on a light anytime soon, lol

10-05-2011, 09:18 PM	#6
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,516	Re: 72 GMC single lamp dual beam headlights Here's just one supplier.... Google will probably find more. http://www.rallylights.com/detail.aspx?ID=351 __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay

10-05-2011, 09:57 PM	#7
Glennerd Registered User Join Date: Mar 2011 Location: Vancouver British Columbia Posts: 170	Re: 72 GMC single lamp dual beam headlights Thanks, Stocker. A buddy of mine was suggesting going with a bulbless lamp and using an HID system for max lighting. This looks as if it will do the trick. Awesome!

10-05-2011, 11:25 PM	#8
Stocker 20' Daredevil (Ret) Join Date: May 2003 Location: Jefferson State Posts: 13,516	Re: 72 GMC single lamp dual beam headlights Looking at that link, it appears to be a sealed-beam lamp. Not what I had in mind (sorry) -- I didn't think Hella even made those.... That site does carry E-code lamps, though, and that's what I would choose over sealed-beam any day. This looks like the right ones: http://www.rallylights.com/detail.aspx?ID=733 I have not found a need for higher-wattage (and more costly) bulbs. The 5006A - 60/55W Hella bulbs (H4) work very well. You could call 'em for more info.... I've dealt with them before, they're very helpful. If you want a true bi-xenon HID, I think you'll end up paying quite a bit more. That's something I've never really looked into, though. __________________ - Mike - 1972 K20 LWB 350/350/205 RIP El Jay Last edited by Stocker; 10-05-2011 at 11:54 PM.



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