Useful Information
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Here we provide information about lighting and to dispel some of the myths and expose misleading information
Efficacy - this is an indication of how much power (in Watts) it requires to produce a lumen (lm) of light
Typical Values
Incandescent (standard light bulb) 15-35lm/W
Halogen - 20-30 lm/W
Metal Halide 65-115lm/W
Fluorescent 30-98lm/W
LED 80+ lm/W
Care needs to be taken to ensure figures being compared are comparable. ie total figures including the power supply or adapter.
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