How well do the headlights work on a '69 Camaro RS/SS with the headlight doors closed?, is much vision lost? If fitted with hi-power bulbs is it possible to use them closed permanenetly? I've a customer that has them fitted to his car but does not have all of the door actuation mechanism, hence they're permanently shut. As the car's in his garage he's unable to see how well they'd work closed, thanks.