1. Lumens (lm) are considered to be the measure of the total amount of light visible from a beam. The lumen output is measured at close proximity to the light source.

2. Watts is a measure of the amount of energy consumed by any given luminaries.

3. LEDs' very existence is low power, high output. Big power consumption and big Watts go against the very existence of LEDs.

4. Lux is defined as being the measure of light intensity, as perceived by the human eye. It is the measure of light at a given distance on a surface.