lol ya you can but i find germ under cfl or t5 lights so much better for 1 save money. germ under cfl then around 2 weeks old just until u get the second node stick it under the mh for ur 24/7 veg or 18/6 veg time but anyways i dont have a mh but did so much reaserch before i did my grows that i could build you the perfect grow room in any sercmstance