PAR is an acronym for Photosynthetic Available Radiation or Photosynthetic Active Radiation.
I personally recommend the MQ-510 Full Spectrum Underwater LED PAR Meter to determine PAR values in my system.
My reef system is shallow—only 10 inches high—so my corals are accustomed to receiving high amounts of light.
Note: Just because a species is listed as venomous, it may not result in death. The effects of venoms range from mild stinging sensations to the possibility of death. This broad category helps you be alerted to what you are dealing with regarding the listed species. You must decide on the level of research and what precautions you will need to take.