The red lense does come off. You have to use a screw driver to pry it off. It's not easy because dirt and corrosion makes it stick together, but it does come right off the black plastic backing. Then of course it's easy to change the bulbs.
If unscrew the white ground wire the backiing plate and lights slide out the bottom of housing. Makes it easier to changr bulbs without jamming your hand in there
