Another BS answer!
T5's adequate? You bet your ass they are! Just have to have enough!
Look at RM3's T5 only grows and weep !!!
https://www.rollitup.org/t/light.853779/
The thing I would say is "Stay away" from cheap LED lighting! Unless you by or build COBB LED's ,,,, they're not worth it!
They do a good job at vegging but, those stupid "blurple" lights fall on their face for quality Blooming!
DE HID
CDM HID
even "plain" HID will be a better LONG term investment!!!!
@40below
OR simply supply enough T5's and use differing spectral bulbs for some real spectral control, including UVB!
How big a space will you be using?
Everyone wants to go "bigger", so look at being bigger and consider 1K DE (dual end) Gavita light.....OR simple 1K HID (they now have Dual Arc bulbs that combine 600w of HPS with 400w of MH to give a broader spectrum) and of course CDM - Ceramic Metal Discharge lights !
Enough Light = The easiest, most effective way to bigger more dense buds!