Which would be better for a sps dominant tank t5 or leds
This is a question that is subject to numerous opinions, and like anything else everyone is entitled to their own opinion (based on their experiences). There are many LED fixtures that are well suited for an SPS dominated tank (depends on who you ask). T5's and Halides of course will also work. Halides of course are a tried and true method, (ask any traditional old school reef hobbyist), but that doesn't mean that Orphek Atlantic V4's or Radion
Ecotech XR30w G4 Pros or GHL Mitras LX7206's won't do the job (or certain Pacific Sun fixtures, and numerous other brands). Of course the proper number of fixtures related to tank size (and animals being maintained) needs to be considered for proper lighting.
Then there are the hybrid lighting systems......T5 plus LED's, Halide supplemented by LED's etc.
I myself have a hybrid system which is comprised of 2 x Photon V2+ fixtures in combination with 4 x 80 watt T-5's. I consider my DT to be SPS dominated and this does the job for me. Is it the BEST coloration/growth etc? Well ...that is subject to debate as well.