There is no best and as stated above by
@Jon Fishman it will be subjective. We all have different opinions based on what we have used or currently using. To complicate it what works for one may not work for the other. Plenty of successful tanks (by success I mean shows healthy coral growth and maturity - not necessarily color) are being run by LED's, T-5's, MH, combination of the three, and....natural sunlight (indoor tubes and outdoor systems).
Anybody here who says this is the best is wrong. Unfortunately while it is best for "them" it isn't the best overall. Plan the system and any lighting will work. And by plan I mean tank, flow, parameters, lighting, livestock (coral and fish), and anything I may have forgot. The key to success is having a plan and keeping things that fit within.
Sorry if this isn't a "this is the best" reply but it is, well, complicated.