I can tell by all the ventilation slots that these are high output drivers. These are well built fixtures and have a little weight to them. Tubes are not visible because of the frosted lenses but it appears there are double rows of high density LEDS in each tube making this the equivalent of an 8 tube fixture. I don't know how long they will last but I am optimistic. I hung these from a strong back and chain. It looks like you may be able to buy brackets for these to mount to the ceiling. I wish I had known that at the time of purchase.I have 2 sets of lights. Under the "normal" tube style fixtures I had 266 Lumens at 36" above the ground. With these I had 466 Lumens @ 36" So, much stronger.
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