Is it to late to swap lights?

So thought I was doing ok, but oh so many ways to f$!k up. I started four northern lights from fem seeds 3 weeks ago. Since transplanting 2 weeks ago to 5 gallon smart pots I've had them under 400w hps. Is it too late to swap out for the metal halide bulb? Will something weird and unforeseen happen if I do?

Attached a pic of one of the girls from today.

vhawk

Your plants will thank you. Many people here use MH or a combo of MH and HSP.... Plants won't mind the change a bit.

Thanks Phase. Forums like this are amazing. I see experienced growers as field researchers now that I'm learning to grow. The smart guys/gals that get their hands dirty.

Yeah just swap out the bulb. Be sure to put the hps back in for flower.

A lot of people veg under HPS too if you have a quality HPS.

Not something to trip much out about, your plant looks awesome either way