when to put seedlings under 400 watter

[GaGrown]

You can put them under it now,if you have the head room? Just raise the hood up high.Make sure you have good ventilation.I've got 55 seedlings under a 600 watter,with no troubles.That 465 cfm fan helps get the heat out.My room has a thermostat to turn the fan on and off at 78 degrees.

Ga Grown!