GJB, I have changed my 31 UL several times and think the 35 S is the same. The lens comes off by prying it out with a screw driver while you squeeze at the same time.. It may feel like it doesn't want to move, but it will. It is a regular, not LED, bulb and can be replaced with a white or amber bulb. Buy a couple, they seem to go out every so often. The lens will then snap back in place as you squeeze and press. Good Luck