I made a custom DM LED holder because I got tired of it being constantly dark behind the DM screen when we play with ambient lighting.
I mounted a simple LED strip inside using double-sided tape, and designed the end so it can run either on batteries or from mains power (I have a built-in power supply integrated into my table, with proper ports).

The whole thing is attached to the DM screen with regular paper binder clips, making it an extremely simple, cheap, and cost-effective solution — no permanent mods, no hassle.

Hopefully this will be useful for other DMs as well. Fewer blind rolls, more dramatic reveals. 🎲