What are Lumens?

A guide to LED Lumens

• by Admin
• July 9, 2014

A lumen is a measurement of light directly relevant to human beings. Instead of trying to measure the number of photons or raw radiated energy, the lumen scale describes the amount of light, or brightness, that the human eye perceives.

All modern lightbulb packaging shows the number of lumens the bulb produces. An average 100-watt incandescent bulb, for example, produces about 1,600 lumens.

Watts and Lumens in LEDs

LEDs that are bright enough to replace incandescents for household use---that is, producing the same number of lumens as standard 40- or 60-watt bulbs---typically only use 9 to 12 watts.

Light Quality

Lumens don't describe the quality of the generated light --- its color, tone or other variables. Some people find they don't like the light that certain LED bulbs produce, describing it as "cold," "pale" or "dim".

Find out more about LED Lumens here:

• http://en.wikipedia.org/wiki/Lumen_%28unit%29
• http://en.wikipedia.org/wiki/Luminous_efficacy
• http://es.wikipedia.org/wiki/Eficacia_luminosa