Composite headlights started appearing in the 80s and have been used for years. They could be molded into just about any shape, which allowed automakers to change the look of the front end of their vehicles. One major problem with plastic composite headlights is that they dull over time. Not only is that kind of ugly, but it really cuts down on the amount of light coming out of the lens.
What’s been done here is the melding of second-gen Cimarron front clip with a Chevy Cavalier convertible body, made possible by their shared J-body underoos. Extra effort has gone into this conversion to Caddy, although the tail lights are from the earlier Cimarron and not the wrap-around units that match the later composite headlights up front.
The best way to restore these types of lenses is through a sanding and polishing process that really makes them much clearer and brighter. If the bulb burns out in a composite headlight, you don't have to replace the whole thing.
Smaller halogen bulbs are usually used with composite type headlights and you should only have to replace the bulb if your light goes out. Getting them out is usually not that big of a deal, if you can get at the back of the headlight housing. In most cases, you simply twist them about a quarter turn and pop them out. Make sure that you don’t touch the glass part of the replacement bulb, because the oil from your skin can cause it to burn out prematurely.
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