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This makes it the safest source of pool lighting to use if you plan to do any swimming at night. Any other type of underwater lighting fixture that operates on current can pose a risk of electrical shock if it becomes defective. This is not as big a concern as it once was, however, because most pool lights now are low-voltage and therefore non-lethal.
The biggest safety hazard of underwater lights is actually heat. Hot lamps can burn a swimmer’s skin if he or she comes into direct contact with the lens. In a fiber optic swimming pool, there is no heat coming from the optical cables. This eliminates the need to minimize the number of actual light fixtures that one can safely place in a pool. Light can shine from every point underwater if so desired, and the temperature will not even rise one degree.
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