I think a few of use use (or have used) these tubes in the past, myself included. I don't think they'res any debate that the plants like them, but the colour is very warm and not to everyones taste.
The following are links to photograpghs of my tank...the first one is a shot of my tank at the very beginning with only two of the Dennerle tubes. Dennerle only
yep excellent tubes, i have one in both my planted tanks along with arcadia freshwater tubes to bring the colour up. dennerle on their own looks a little red/orange but the plants love it. definatly worth a buy in combination with something else in the 6-7500K range.
thanks but i need 48 inch ones . the reason i was thinking about the Dennerle lamps was at the moment i have some T5s over the tank but it makes my tank look a little washed out so as the Dennerle lamps have a red tint to them it might make the tank look a little better