that rule does not apply to LED's. if what Buzz1329 said was true then a single 120w Led unit will not be enough for a 120 gal. LEDs are mostly directional with not much wide angle light structure. also every LED fixture has its own par reading and work/act differently.
with LED's mostly coverage is the big issue than wattage.
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Current Tank Info: 350g DT,95g sump, 50g Frag tank, 4800gph return 4x Sea swirls. 6x AI Vega Color. 200# Pukani rock, dual recirculating skimmer, Biopellet, GFO Carbon rx's, Cal rx. Closed loop. 1.5hp chiller, genesis renew. Apex & RKE
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