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PAR for plants, Lumen for people.

While the lumens measurement is based on the sensitivity of the human eye to light, PAR Watts objectively measure the total watts of Photosynthetically Active Radiation (PAR) emitted by the lamp. It accounts for the nutritional value and is a direct measure of light energy available for all-important plant photosynthesis.

Banner Amsterdam Marijuana Seeds

Last update:
2000-12-03 13:13
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