theres a company that sells a LED jbj cube or you can buy the kit later, no heating issues there jbjnanocubes.com, or just buy a stock one and get a clip on metal hilade, in the short time ive been in this hobby ive had CF,T5 and now MH,the growth and shimmer look from the MH is my fav, i had a biocube 29 setup also with a 4x24w t5 on it open top had the light 3inches above the water with no heat issues. its up to you and what you want to do in the future, you will save money just uying what your going to need later instead of upgrading later.