agin .. I belive the question to start with ... was one or the other ..
and then I would for sure .. no doubt .. go with them T5 (that is if I could get them HO "high output" once of course .. in the right coulor)
if the question was between a 400/430 HPS and I had nice temps. wher I live and a good ventilation or money to buy one I would choose the HPS...
but between a 150 HPS and a 4 bulb T5HO fixture with boath 6500K and 2700K bulbs I would at any time choose the T5 .. Im sure they would do a better job if you LTS/TOP/grow autos/Scorg .. and give me less problems with heat .. and I dont mind that they would use less electrisity aswell ..
also .. if you get the T5s .. you could easily buy the HPS next month (if you have more money by then) and use it for flowering or add boath ..
then T5 you will allways be able to use .. I guess the same go for the 150 HPS .. tho Im glad I got them T5s fist... for veg .. now Im happy with my 600w hps
later on I might use em for seedlings and get a 400W MH for veg ?