Just a quick bracket I made to hold my Aglex reef light over a 20 long aquarium. There is 2 files, the smaller one is for the 4 corners. the larger one is to zip tie the power cord to for a cleaner look. This may fit other chinse black box reef light but you may have to adjust the space for them to sit in.

Creality

Ender 3

No

No

25% or more (up to you)

@25% infill is more than strong enough. I print at .3 layer height and its about 42 min.