I have 2 of these over my 75 gallon tank, and I LOVE them

I also highly recommend them. Mine are white in color. I like colors that are as close to natural (solar and lunar) light as possible, and I believe these white lunar lights come very close to the natural moon's light. I didn't screw mine to my tank hood (mainly because I have a glass top, lol), but they're hanging about 5 inches above the tank. And I have to tell you that they look much better this way because the higher light location illuminates more of the tank's inside and with a gentler intensity. This way, they don't look like spot lights but rather as a natural moon light, which is exactly what I wanted
I don't know if you can see the color of the light well, but here is a picture of my moonlights on, taken while I was setting up my 75 gallon tank: