35 ppm is not dangerous to people at all. With a CYA level = 150 ppm, 35 ppm FC is LESS aggressive than pool water that has 1 ppm FC and no CYA! (There is a difference -- 1 ppm FC will be used up rapidly by swimmers in the water; 35 pp will not. The 'extra' held by the CYA will continuously replace the 'active' chlorine as it gets used up).

But, it *may* be 'dangerous' to some swim suits, so wear an old one. It will also be somewhat irritating to your eyes, but, when trying to open the light niche, it would be best to use goggles or a mask regardless of chlorine level. In most cases, there's a single screw that needs to be removed to allow the light niche to 'flop' out.

This video, from Inyo pools, comes closest to showing what's involved. Obviously, you don't need to focus on the bits about actually replacing the bulb or lamp.