hi all, i plan to use 2 of these http://www.hydrohobby.co.uk/t5-lightwave-2-4.html in my empty closet (90cm x 90cm x 150cm), i want to know if 2 of these 2ft 4tube lights will be enough to veg plants 4-6 weeks? i have a seperate tent with 400w bulb for flowering... also what kind of heat issues will i get with 2 t5s?