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 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've lived in Oregon for 3 years now after having moved here from Arizona. Every Winter is very long up here and has been very difficult for me. After doing some research and spending a pretty penny I bought the 'Carribean Sun Blue' light box. I used it for 5 months with no result. I only found the color and brightness rather irritating. After doing more research I purchased your light box, rolling floor stand (a great accessory!), and storage bag. The results were darn near immediate. I'm never going back. I enjoy using this product every morning for about an hour while on my PC. My outlook has improved and I have begun finding it easier to get out of the house and do things. Something that it difficult for people suffering from depression. I am convinced that I am not experiencing a 'placebo effect' with your product as I have tried out another light box to no effect. Thank you so very much. It was worth every penny that I spent. Wish I had picked it out sooner."

Steve T. | Cottage Grove, OR
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