Watt: The power needed for an application. Example: you need 100 watts to run a 100-watt light bulb.
Lumens: The units used to measure the power of light. Goal – achieve more lumens using fewer watts.
Kelvin: Unit that indicates the color of light, and it’s somewhat counterintuitive: The lower the Kelvin temperature the warmer the light color; the higher the temperature the cooler the light.
