Detailed FAQ
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How good is the quality of light emitted by an LED Tube?

   Energy efficiency of light sources is typically measured in lumens per watt (lm/W), meaning the amount of light produced for each watt of electricity consumed by the light source. This is known as luminous efficacy.

   The efficacy of LEDs exceeds traditional types of lamps. For a rough comparison, the range of luminous efficacies for traditional and LED sources, including ballast and driver losses as applicable, are shown below.

Light Source Typical Luminous
Efficacy Range in lm/W
Incandescent (no ballast) 10-18
Halogen (no ballast) 15-20
Compact fluorescent (CFL) (incl. ballast) 35-60
Linear fluorescent (incl. ballast) 50-100
Metal halide (incl. ballast) 50-90
Cool white LED 5000K (incl. driver) 80-100
Warm white LED 3300K (incl. driver) 75-95

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