you should be able to get a 250 watt lamp alot closer than 18 inches would expect you should be able to get it within 5-10 inches from the lamp to the tops of the seedlings do the hand test to help determine how far away the light should be, put a small fan on the seedling to where they are barely moving a little.
and when you transplant in a week or two plant them deep up to just below first round leaves.
bejay Reviewed by bejay on . leggy seedlings w/plenty o' MH Hi. I've got some unexplainable leggies. 1 week old big bud seedlings. been 18" below a 250MH @ 70 - 80 deg 50% humidity ever since planting. The temp has dipped a few times to mid 50's. Leggy as ****! Fresh soil Bulbs about 6 mo old/ agrosun. This is the leggiest one Rating: 5