There are 2 kinds of T5 tubes.One is like the oldfashioned,just stronger(and thinner),kind of HO.Then there is "Compact T5 tubes"
These are double and on 55 watt each.One unit usually consists of 2 or 4 compact double T5īs.THESE are the ones to buy.Today they can be bought for the price of an oldfashioned tube some time ago.
Usually they are in a mixed spectrum too.One doubletube is cool white,and the other cold white.
But the other T5īs are absolutely also good to use.It has become more easy and cheap to light da ladies.!
The picture is one of my Cinderella 99.Have been in flower 3 weeks today.