Does anyone have any experience with these. I got some at a estate sale, and have 2 of the 28 watts currently on 2 dwc plants. Not really sure what to think yet as they have been on them for a couple of weeks. I know the plants are really green. But so are the other plants under T8's. I have noticed that the ones under the led's have seemed to go flat on top if that makes any sense. I will post some pics later tonight when I get home.