Need light

Can some one tell me if I should leave my seedlings under t8 or 400w hps
They are a week old seem great no stretching r nothin just wanna get the ball rolling a bit faster

hps all the way, works fine for me m8

I blew all my money on lights. Now I have 2, 600W, MH/HPS, and 1, 400W MH/HPS. I haven't vegged with it yet, but the difference in the flower growth was immediate.

Use a mix of lights for a fuller spectrum. 3 to 1 ratio. Flower, I have 1,200W HPS and 400W MH. Veg will be the other way around, 1,200 MH and 400 HPS.

Have fun.