What Does Lumens mean

What does Lumens mean?

The technical definition of lumen is as follows; A lumen is the standard measurement for a unit of luminous flux, it is a measure of the perceived power of light.

Why is looking at the Lumens output now important?

Most people are familiar with incandescent light bulbs that are measured in watts, for example you know what to expect from a 40w, 60w or 100w bulb. With LED Lighting, While you would automatically assume that higher wattage you use, the brighter the light you will get, it's actually not really the way that it works. That's because watts and lumens measure two very different things. A watt is a unit of electrical energy in other words, input. A lumen is a measure of light intensity output. More simply a light bulb uses watts to make lumens. As there are so many different types of LED chips each with different lumen outputs, you cannot now assume that for example all 4w LED lights offer the same lumen output. Different types of LED Chips are as follows; High Power LED Chip, Dip LED, Lamp LED, SMD, Flux LED, COB LED.

With LED Lighting being more directional than incandescent lighting, the lumens output to achieve the same brightness will be lower for LEDs than traditional lighting. A large percentage of the lumens output is wasted due to the directions in which the light is output.


LED Lumens effeciency

A standard 100 watt incandescent light bulb uses 100 watts of power to give around 1500-1700 lumens output, This is about 17 lumens per watt (17 lm/w). LED Replacement lamps offer even more lighting efficiency. some of the lights in our range are already offering over 90 lumens per watt and there are already some manufacturer making LED lamps that will put out 100 lumens per watt.