For LED, price aside, do look out for support. Buying overseas is cheap but that is provided you have means to get support. Otherwise, it may be penny wise pound foolish.
Prioritise your buying consideration to narrow down your choice, otherwise you will be flooded with Suggestion. For 4 ft, razor 160w and mitra are supposed to be able to support 3ft. The rest, mostly support 2ft. So it seems like you need 2 sets for all brands(available in sg market) unless you going for supplement. LED has high start up cost but save on long run. If you are going into sps and serious about it, then your choice may be limited to few proven brands which can keep it survive and color up your spses.
The other options of MH & T5 are still available but cost on the running and consumables like bulb are high.