Can anyone tell me when is the best time to take my 4 ft flouresent lights off of my babies (which poped up 3 days ago ) and go with all MH light ? I have a 400 W MH with an A/C cooled reflector
u can put them under a HID right away, but with seedlings u want a further distance. or u can tone them, turn the MH while the florescent are on, for about an hour every day for a few days, then increase the time to 2 hours 3 and so on till they can handle it.
It's fine to start the babies on fluoros/CFLs, you don't need a lot of coverage and you can save a few pennies on the power bill. Start that fluoro at about 3 inches and within a day or two get it to about an inch away from the plants, you don't want them stretching for light.