Just got some and they seem great especially for cost although heavy and have proprietary hanging cables. Issue I have is that they can not be mounted within 2 feet of top of tent, since one end of cables has proprietary connector and the cables are too long with no way to adjust length. Would be great if growing in warehouse, but I am poor hobbyist. I do not want to ghetto rig it and have it fall on head, kill plants, or start fire if they fall on plants and keep running.