ok if ur growing in a room 2m high (plenty of room imo) do u gain any advantages from topping? how does it effect yield? does it have varied results depending on set up and strain?
if so (hyperphectiaclly of cors) i got 10 euforia seeds in a nft setup under a 600w hps (also have a 400w available) room 1.2mx1.2mx2m

so to sum up, should i top? and shud i use the second light?
thanks adz