I use a HO T5 light for my clones and mothers and it works great. Little heat and power consumption. The only downside is there isn't a lot of light penetration so I try to keep them as short as possible. Been experimenting with LST. I think a 400w HPS is a better flowering light than a veg light. 400w MH is great for veg. I'm not a huge fan of LEDs but my buddy grows some nice vegging plants under a LED and flowers with 2 600w HPS.