Catalog excerpts
Photometric Performance 1. Two versions are available/Narrow Beam'- for maximum penetration and 'Spread Beam'- for wider distribution. 2. The Narrow Beam' gives the maximum penetration in open water. 3. The Spread Beam' gives a wider distribution for in dock enhancement. 4. The Narrow Beam version has 8x the on-axis intensity as the Spread Beam 5. The LED current is optimised to maximise performance depending on the operating environment. When operated underwater the LED current is increased. The performance figures quoted are for underwater conditions. 6. Luminance meters which are not optimised for the LED light spectrum will not always give accurate readings. Mechanical Information 1. All nylon construction. Nylon is chemically inert and highly impact resistant. 2. Two colour over-moulded outer lens for improved appearance and enhanced outer lens strength (double thickness). 3. Double seal of rear cover for additional protection against water ingress. FF12 Surface Mount Underwater Light
Open the catalog to page 1Photometric Performance Narrow Beam - for maximum penetration Smooth optic Spread Beam - for wider distribution optic with prisms and texture FF12 Surface Mount Underwater Light
Open the catalog to page 2Narrow Beam Photometric Performance Beam width (FWHM*): Polar Intensity Plot (candelas) - Brightness F71 Intermediate levels auto-update illuminance measured *FWHM = Full Width Half Maximum - the angle subtended by the light intensity measured at 50% of the on axis value. FF12 Surface Mount Underwater Light
Open the catalog to page 3Spread Beam Photometric Performance Fixture flux: Beam width (FWHM*): Polar Intensity Plot (candelas) - Brightness [71 Intermediate levels auto-update illuminance measured *FWHM = Full Width Half Maximum - the angle subtended by the light intensity measured at 50% of the on axis value. FF12 Surface Mount Underwater Light
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