Use the search button on the top of the forums. Soooooo many posts about this.
'Better' depends on what criteria you are judging them on.what are better t5 or mh.mh gives off so much heat.
knock on wood, this has been true for mei will told i can grow any thing with t5s. is this true?
i do run a fan anyways so the bulbs stay cool and put out good PAR.