No. Diamond water is for human consumption. The last stage of the filter system add mineral and other chemistry back to the water before discharge
Long use can result in hair algae grow.
A good set of LED is equivalent to a good set of MH or T5 set minus the regular need to change the light tube and ballast.
With money saving on your monthly electrical bill.
(Must be reliable emitter from Cree,SSC, Osram,Nicha,Philip,...)