Might the LEDs or HIDs be a better way of obtaining a brighter light? I'm getting ready to order LEDs for my running/brake lights and another pair for my back up lights. I'm opting for clear for both the 1156 and 1157s so they'll display through the red lens nicely.
I seem to recall a few folks saying that a change of flasher might be required if I do that?
But I think you're right 50 watts of heat/light near plastic has gotta be bad news. JMO
Ken