Help please: When to change from 250 watt to 400watt MH

[BeginnerBud2]

Just wondering when to make the change! Seedlings are 3 weeks now a quite a bit bigger than this photo

 

[Bill284]

Just wondering when to make the change! Seedlings are 3 weeks now a quite a bit bigger than this photo

I think we talked about this on your other post. You can do it but untill they get bigger and growing vigorously your 250 is more than sufficient.

 

[bobrown14]

Then when you're plants are bigger just ADD the 400w - thank me later.

You got a ways to go tho.