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Underwater Pool Lighting: What You Need to Know 3

- Sep 07, 2018 -

The correct unit of measurement to use when measuring brightness is lumens. A lumen measures the amount of light that is emitted from a light source. One lumen is equal to the amount of light emitted from a standard birthday candle from one foot away. The ultimate goal is to produce the most light (lumens) with the least amount of energy (watts).

Many of the older swimming pool codes require 1.0 or even 0.5 watts/square foot of water surface area. Updated codes have taken the new aquatic trend of using LED-style lights into account, and have converted their measurement requirements to lumens/square foot. According to section 4.6.1.5.1 of the Model Aquatic Health Code, “Underwater lighting, where provided, shall be not less than eight initial rated lumens per square foot of pool water surface area.”


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