Full Spectrum Lighting FAQ


Full Spectrum Light Chart

As experts in Therapy Lamps and Full Spectrum Lighting, we receive many questions about the technical details on the lighting products we offer. To help you better understand some of these terms, we’ve put together this FAQ and we hope you find this useful when shopping for a light solution this season.

What is a LUX?


LUX is simply one lumen per square meter and is a measure of visible light over an area. While lumens measure the visible light output of a source, LUX actually quantifies the level of visible light in an area. A higher LUX means you will require less exposure time for therapeutic results. For those who are particularly light-sensitive, you can get the minimum dosage of light using a 2,500 LUX system such as the Verilux HappyLight 2500 for an average of two hours per day.

What is a Lumen?


Lumen is the SI unit of luminous flux. This measures the amount of visible light emitted by a source. While lumens measure the amount of light produced by a light source, more lumens do not necessarily equate to a brighter environment. To measure that, refer to LUX.

What is Full Spectrum lighting?

Full Spectrum lighting, also known as Natural Spectrum, is light that covers the electromagnetic spectrum from infrared to near-ultraviolet, or all wavelengths that are useful to plant or animal life. “Full-spectrum” bulbs produce bright light similar in color composition to natural daylight.

How does light therapy affect mood

Serotonin, a neurotransmitter or neuropeptide, is high when we feel good and are relaxed, positive, focused, and have less pain. Melatonin, which helps us sleep, is produced by the brain’s pineal gland when we’re in the dark or dim light. Bright light, specifically blue wavelengths, switches melatonin to serotonin. Full spectrum light helps us wake up and be more alert and yet calm.

What is CRI?


CRI stands for the Color Rendering Index, which is a measure of a light source’s ability to reproduce color in comparison to a natural light source (typically compared to daylight).The higher the CRI, the more vivid things appear to us and your eyes work far less yet you see much clearer. The sun is 100 CRI while the best man-made lights range in the 90s.

What is Color Temperature?


Measured in Kelvins (K), color temperature compares the color of light produced by artificial means to that of natural daylight. Daylight has a Kelvin measure of approximately 5780K.

What is UVC light?


UVC is filtered out by the ozone layer and does not normally reach the surface of the planet. UVC is harmful to living cells, and is used to limit microorganism growth in hospitals, food processing facilities, water treatment and HVAC systems. We offer a selection of UVC Light Sanitizers from Verilux.