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 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 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 really like the Alaska Northern Lights box. It's BRIGHT and the light is still very easy on the eyes- not all light boxes are like that. It's 10,000 lux at a couple feet, I believe, which means the box doesn't have to be right in front of my face to work for SAD. The workmanship is excellent and I'm very happy with it. I also bought the floor stand, which could use improvement in one area- it only tilts at a few set angles and can't always be set as I'd like. That said, I'd probably buy the stand again- It allows the light to be at an angle coming from above which is more natural and not only does it work great for SAD, but makes a VERY nice area task lamp with a very bright, soft, even light that covers an entire work area."

Michael H. Vancouver, WA
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