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#4701763 - 03/21/18 10:59 AM Why did they ever go away from glass head lamps?
BAJA_05 Offline


Registered: 02/04/18
Posts: 411
Loc: Chester County/Pa.
Hello everybody, years ago cars/trucks had the glass head light lenses and they worked perfectly in my opinion. Fast forward years and all these car/truck manufacturers use plastic. The glass, all you had to do was clean them and they would be fine -- no hazeing or showing scratches. These plastic lenses are JUNK and a pain in the arse.


Dale


Edited by BAJA_05 (03/21/18 10:59 AM)
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#4701768 - 03/21/18 11:06 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
Danno Online   content


Registered: 10/07/12
Posts: 2051
Loc: Northern Ontario, Canada
Plastic is cheaper and is easy to mold into complex shapes. Automakers don't care about vehicle appearance or longevity after they leave warranty. Call it school of hard knocks.
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#4701769 - 03/21/18 11:06 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
E150GT Online   content


Registered: 03/11/12
Posts: 1246
Loc: San Antonio, TX
because plastic is cheaper and lighter and much easier to make curvy like todays cars.
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#4701771 - 03/21/18 11:08 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
UncleDave Offline


Registered: 06/02/14
Posts: 1738
Loc: Ca.
Years ago headlights were all simply flat faced rectangles of varying sizes.

The shape of headlights radically changed with them being blended into the aero of the car and lights are no longer identical between models.

It isn't economically feasible to shape glass for each model vehicle, then change each model year, it could be done but the lights would be horrifically expensive.

UD
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#4701777 - 03/21/18 11:11 AM Re: Why did they ever go away from glass head lamps? [Re: UncleDave]
AZjeff Offline


Registered: 01/14/11
Posts: 2846
Loc: PV Az
Originally Posted By: UncleDave
Years ago headlights were all simply flat faced rectangles of varying sizes.


Youngster. Years ago headlights were round before they were rectangles! grin

The makers of the sealed beams fought for years to keep the curved plastic lenses from being certified for highway use.
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#4701785 - 03/21/18 11:19 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
Virtus_Probi Online   content


Registered: 06/25/15
Posts: 4200
Loc: New England
There also used to be a lot more glass around from headlights shattering during fender benders...don't miss glass headlights or bottles at all.
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#4701809 - 03/21/18 11:33 AM Re: Why did they ever go away from glass head lamps? [Re: Virtus_Probi]
GravelRoad Offline


Registered: 05/30/15
Posts: 170
Loc: Virginia
Some people before that were not happy with the electric light bulb replacing the carbide lamps or acetylene gas lamps on their vehicles.

shocked2
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#4701821 - 03/21/18 11:40 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
miden851 Offline


Registered: 02/15/16
Posts: 480
Loc: GA
The same philosophy is catered in bottling of soft drinks these days
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#4701829 - 03/21/18 11:46 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
JLTD Offline


Registered: 12/15/17
Posts: 937
Loc: US
Bulbs last longer in the new applications and the light is brighter.

One thing I most definitely miss about sealed beam headlights, is that the heat would melt off the snow and ice.
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#4701831 - 03/21/18 11:47 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
Wolf359 Offline


Registered: 04/27/12
Posts: 5042
Loc: MA
Probably due to CAFE. I had those old square lights on an older car and when it burned out I think I got another lamp at the auto parts store for around $5-$10, it was glass. It was pretty heavy compared to the one that the automaker put in which was plastic. Plastic is really light.

Some of the new lights are fine though, they really blend in with the car.

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#4701832 - 03/21/18 11:47 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
WhyMe Offline


Registered: 12/18/12
Posts: 591
Loc: Washington for now
i am glad they went to plastic. like windshields, glass headlight would get damaged by rocks easily. then they lose their seal and condensation clouds them up.

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#4701833 - 03/21/18 11:48 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
BrocLuno Offline


Registered: 09/06/15
Posts: 5700
Loc: Kalifornia Kollective
Plastic bottles (key up sad music) => Pacific Gyer: Wiki

Glass headlights could be behind plastic aero shields (Ex: Jag XKE), but that would make for increased production costs...

I suspect we'll go back to glass bottles someday for enviro reasons ... Glass headlights, not so much (although I'd like to) frown

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#4701837 - 03/21/18 11:50 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
Kestas Offline



Registered: 06/04/02
Posts: 12466
Loc: The Motor City
The reason they switched is for styling.

It also helped that it provided a new venue for the automaker to make more money with replacement parts. Instead of $10 apiece to change headlamps, it's now $150. You still have to pay $10 if the bulb burns out.

This is one case where older technology is better. Other than styling, I see no advantage with the new plastic headlamp designs.

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#4701854 - 03/21/18 11:59 AM Re: Why did they ever go away from glass head lamps? [Re: BAJA_05]
andyd Offline


Registered: 09/25/04
Posts: 7452
Loc: Marshfield , MA
I used Hella H4 housings to replace the 5 1/4 round low beams. I'm thinking of grafting them into the Rat to replace the milky plastic lights on the Rat grin2
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#4701860 - 03/21/18 12:01 PM Re: Why did they ever go away from glass head lamps? [Re: Kestas]
SeaJay Offline


Registered: 03/05/15
Posts: 1130
Loc: New York City
Originally Posted By: Kestas
The reason they switched is for styling.

It also helped that it provided a new venue for the automaker to make more money with replacement parts. Instead of $10 apiece to change headlamps, it's now $150. You still have to pay $10 if the bulb burns out.

This is one case where older technology is better. Other than styling, I see no advantage with the new plastic headlamp designs.


Bingo, a double play for manufacturers. They sell more cars cause they are cool looking, and sell more replacement parts. $$$$$ rules the game.

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