| I have been using twin fluorescent light fixtures ( 7 of them now) ever since I started . Each one has a cool white and a broad-spectrum bulb (40W each). Cool white is about $2 each and the wide spectrum is about $8 each. I believe it is suggested that we change the wide spectrum bulbs every year.
The plants are doing OK but then I have no other setup to compare it with.
I think the high end ones generate too much heat. If I am not mistaken almost 85% of the energy is dissipated in the form of heat rather than the light. Some may consider it to be wasteful and not too environmentally friendly.
I think there is a member here who has had success with T5s. I am sorry I can't recall the nick.
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