It has 3 small fans that are barely audible, but it mostly works with an enormous heatsink inside the metal area. The fans direct the heat away from the heat sink very well.
The light was packaged well and received in great condition. The bulbs are replaceable. The lights are bright enough to provide the sun supplement my plants need to grow since i don't have much bright sun coming in my windows.
The control switch is super easy to navigate and there are 3 hr, 6 hr and 9 hr timers for the lights. I also love that it has a timer. The timer feature is awesome cause i can set it for the day and not worry about it.
I like to use these lights in shaded areas of my home where i have a plant that requires more light. It gives off a glow and looks like sunshine against my walls.
The lights are 5 volt but the 50 watt rating is completely false. The clamp is utterly useless as well and can only affix to something that is at least 3x3x1. If you try to arc the lamp, it will flop over like the head of a newborn baby.
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.
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