Reef-Safe PAR distribution
ReefLED 90 used for demonstration PAR distribution
Aquarium PAR Map
How we measured
Measurements taken in a saltwater aquarium using an Ocean Optics Flame T VIS-NIR spectrophotometer.
ReefLED 160S mounted 31cm / 12” above the center of a 80x80x80cm / 32″x32″x32″.
ReefLED 90 mounted 21cm / 8” above the center of a 60x60x60cm / 24”x24”x24”.
ReefLED 50 mounted 17cm / 7” above the center of a 50x50x50cm / 20″x20″x20″.
PAR vs. PUR
Using PAR measurements only to determine light quality or compatibility of a specific light unit for coral photobiology can be misleading.
The PAR measurement was developed to measure the Photosynthetic Active Radiation of plants that is within the visible light region (400 -700 nm).
The Photosynthetic Utilized Radiation or PUR that is relevant for optimal Zooxanthellae photosynthesis is between 360- 480 nm which starts outside the range of visible light (measured by PAR meters) in the UV region and continues into the blue part of the visible light range.
PUR/PAR values at a point directly under the center of the ReefLED, just below the water surface.