A “lumen” is an industry standard measurement of light output. It is measured by an electronic meter from a single direction of the light source. The resulting measurement of “bare” light bulbs is usually printed on the box by the bulb manufacture. While this is useful for comparison, there are some things that you must consider.
1. Color – The electronic meter does not record the same wavelengths as seen by the human eye. So, while the electronic meter may record both Cool White and Warm White bulbs as having the same “lumens”, the human eye will actually register the Cool White as being “brighter”.
2. Fixture – Remember that the standard lumen chart is the rating of the bare bulb. It does not take into consideration the type of fixture that holds the bulb. Most fixtures will actually reduce that lumen level by 10-40% or even more depending on design. Items such as decorative metal work or frosted lens can be a big reduction in light output.
3. Direction – Remember that the meter records from a single point from the bulb, but we are interested in “all” the light emitted to cover an area. This goes back to fixture design. A well designed fixture will have reflectors to focus light that would have been lost and direct it into useable light. In cases of a “flood” or “spot” style fixtures, the actual lumen output can be increased above the rated level of the meter.
Divine Lighting are experts in Lighting. This includes “Fixture Design and Manufacturing” as well as “Lighting Application”. So, if you are having an issue with areas of your property (inside or out) that are too dark, too bright or need ambiance lighting for aesthetics or decoration, don’t depend on a lumen chart. Speak to the experts, ask Divine Lighting to solve your lighting issues. Task lighting, security lighting or decorative lighting, the know it all and they make it all!