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COLOUR TEMPERATURE: The warmness or coolness of white light, measured in Kelvin.

Warm Light: Anything below 3,500K begins to have a yellowish appearance. This has a calming effect.
Cool light: Anything above 3,500K begins to have a bluish appearance. Great for focus but terrible for rest.
Fluorescents provide warmer, more natural temperature than LEDs, though tunable LEDs are also available.

LIGHTING SERIES:

We all want to save power consumption but how about brightness? How do you make a choice? Well, just remember Watts measure power consumption while Lumens measure brightness.

LED lights put out more lumens using fewer watts. They also last longer and emit less heat.