Feeling overwhelmed

[dungeon]

You know what else might help, some floating plants like duckweed or frogbit could reduce the light a bit.

[detroit]

To tone down the light, try wrapping it with a transparent blue or red plastic gift wrapper. You can get these at a stationery shop - just get the smallest and cheapest roll. Simply wrap a few rounds around the light to reduce the brightness. The more you wrap, the dimmer it'll get. Secure it with some tape and you're good to go.

You know, first thing to do is check the back and sides of the tank for any reflections. I think this might be the main culprit here, unless your light is really, really bright. I've found that LED lights are super bright when they're new, but they tend to dim down a bit after a few months or years.