that area is relatively small you'll yield the same off 2 bigger plants in the same room then 4 small plants all fighting for the light. better yet in 1.5m x 1m room 1 even bigger plant would do the same as 2.Hi guys, i just wanna ask if an hps+mh light of 250W is okey for growing 4 plants ( AK 48 )in a space of 1.50 m X 1 m ? peace