Broad Spectrum VS Full Spectrum Lights

The NorthStar 10,000™ is a broad spectrum light. With our brightness level of 10,000 lux at two feet, the NorthStar 10,000™ is effective, easy and safe to use!

Full Spectrum
Broad Spectrum

Full Spectrum

Full spectrum light bulbs are made to try to imitate natural sunlight, and like sunlight, they also produce UV rays. Typically full spectrum light bulbs have a Color Rendering Index (CRI) of 90 or above (100 is actual outdoor light) and a kelvin temperature of 5,000 or above. Full spectrum light is described as having a purple or bluish cast. Most light box companies using full spectrum light bulbs now block these UV rays through their diffuser screen, it's good to check to be sure.

Broad Spectrum

Broad spectrum light boxes are described as being as close to full spectrum as you can get without the UV rays. Typically they have a CRI. of around 82 and a kelvin temperature of around 4200. Broad spectrum light bulbs are described as being a pure white light. Most light box companies use a broad spectrum light therapy bulb so that there is no danger of UV rays.

Light therapy with a NorthStar 10,000™ can make your winters happier, healthier, less stressful, brighter and UV FREE!

Actual Client Testimonials

"I have just started to use my light and have high hopes in a much better winter than I have had in the past 25 years or so. Our weather has not changed into the usual overcast or inversions that we normally start experiencing sometime in November so I am not noticing any change in mood or sleeping patterns as yet. However it is so nice to sit and let the light carry me to a sunny beach where I can just soak in the sun."

Carolyn B. | Logan, UT
store icon

Click HERE to see what 50 of our recent satisfied customers have to say!