I always thought that you put clones under MH lamps to veg them out but I was told yesterday that that 400W MH that I have my clones under is actually doing damage to them and that I should put htem under a flourescent light instead reason being that that MH is to intense of a light for young clones. Should I leave them under the MH or put them under a flourescent?
Nonsense. The MH will only damage your clones if the light is too close. With a 400w I would keep it 36" off your clones. If you start to see some stretch, lower it 6" at a time...
Just keep an eye on them... You will know it if they start to fry. If they seem like they are doing okay, they probably are.