Reef Tank Lights checked by reef math.

A reef light has to cover the tank footprint and hit the PAR band for the animals you actually plan to keep.

Professional buying context

  • The common mistake is buying a light that grows soft corals now but cannot support the mixed or SPS reef the keeper already wants.
  • Match coverage width, coverage length, PAR at depth, mounting plan, and fixture count.
  • Professional fit checks should validate the catalog value behind "fixture coverage >= tank footprint and PAR >= coral goal target" against the actual tank dimensions, bioload, livestock goal, and maintenance cadence.