Heavy & good quality, easy to hang. Presently have a small hydroponic indoor setup. The adjustable output allows you to fine tune your par output levels.

The fixture is small and i was able to mount it easily. The only con is i wish the intensity could be turned down. These lights are very bright and come with everything needed for installation. Decent size and brightness.

I am no physicist but my plants seem to be quite happy and that makes me happy. Love the adjustability of it.

This one is a great addition to my nursery. The instruction booklet is small print but very straightforward in its information. The first two are from the 45w and show 591 and 354 with a x10 multiplier.

Ordered four lights and one just flashes.