A comparative study of light therapy devices conducted to select the optimal device for ciradian rhythm regulation in counter-fatigue programs determined that Sunnex Biotechnologies' Lo- LIGHT therapy lamp is the "best phototherapeutic device". This independent study was published in the prestigious journal Aviation, Space, and Environmental Medicine. The authors of the paper include Dr. J. Arendt - Prof. Emeritus at the University of Surrey, the pioneering light therapy researcher and recognized authority on light therapy. The study conducted by the U.S. Air Force and DRDC* was designed to select the optimal light therapy device for regulating human circadian rhythms for studies on improving the alertness and performance of night shift workers. The authors of the study concluded: "The [Sunnex Biotechnololgies] light tower was the best device, producing melatonin suppression and circadian phase change while relatively free of side effects." See Ref
*DRDC, (Defence Research and Development Canada) is the Canadian Military’s R&D Centre.
Sunnex Biotechnologies' patented GreenLIGHT low-intensity light technology is now being
recognized by leading research institutions as the optimal light technology for influencing human physiology,
and superior to blue light technology. As Dr. C.A. Czeisler, Head of the Division of Sleep Medicine at Harvard
University, explained in comments regarding the optimal wavelengths for regulating circadian rhythms, "based
on results from our prior NSBRI-funded project as well as results from other ongoing projects in our laboratory
... [we] determin[ed] that the most efficacious specialized light source should have a peak near 500nm
(as opposed to ~470nm as the lamps produced by Philips Lighting, Eindhoven, Netherlands, as originally proposed),
and therefore ... [are] retrofitting our laboratory with specialized lamps (manufactured by Sunnex Biotechnologies,
Winnipeg, MB, Canada) with a peak sensitivity near 500nm;". [From NASA's Space Life & Physical Sciences Research &
Applications Division Task Book, on the project Evaluation of Photic Countermeasures for Circadian Entrainment of
Neurobehavioral Performance and Sleep-Wake Regulation Before and During Spaceflight.]
More on the National Space Biomedical Research Institute [NSBRI]-funded project referred to in the above quote
Comparing the phase shifting capability of light therapy devices, the USAF/DRDC study found that less than 10% of the light intensity(energy) from a Sunnex Biotechnologies Lo-LIGHT twin tower unit was substantially more effective than that from a light therapy lamp that emits primarily blue light (the Litebook®). The Lo-LIGHT was also more effective in suppressing nocturnal melatonin levels. In addition to the findings on the regulation of circadian rhythms and of melatonin suppression, the researchers also found that the safe and comfortable low intensity green light from a Lo-LIGHT twin tower lamp to be as effective, or more effective, in improving alertness during the night as were light therapy devices that provided 10 to 40 times as much the light intensity as the Lo-LIGHT.
Selecting the optimal light source for regulating the circadian rhythms and improving alertness of night shift workers was the first step in a series of studies by DRDC and the USAF. The Sunnex Biotechnologies Lo-LIGHT Twin Tower lamps were selected to be used in the development of this night work adaptation program.
The results of these studies are consistent with the current research which demonstrates that the general misconception regarding a superiority of blue light wavelengths to white light for light therapy in the treatment of sleep and mood disorders is false. In contrast to the published studies with GreenLIGHT lamps, several recognized authorities on the spectral sensitivity of human physiology to light, including CA Czeisler, GC Brainard, and SW Lockley, have demonstrated, in a study at Harvard University, that blue light wavelengths are not particularly effective for light therapy. Reflecting on the lack of efficacy of blue light wavelengths for light therapy, these authors concluded in the journal SCIENCE Translational Medicine, "Our findings have implications for the development and optimization of light therapies for a number of disorders, including circadian rhythm sleep disorders, seasonal affective disorder (SAD), and dementia, and the use of light as an alerting stimulus to counter the sleepiness associated with misalignment of circadian phase, particularly during night shift work". Click Here For a more complete discussion, with references.
Several independent studies have now demonstrated that at the light intensity or brightness levels normally found indoors, the Lo-LIGHT has the equivalent effect as 10,000 lux of white light. This is in marked contrast to findings of studies with lamps that emit blue light (460 nm or 479 nm) or white light enhanced with blue light (465 nm). In these studies the blue light or blue enhanced light sources needed as much, or more energy than bright polychromatic (white) LT lamps to induce an equivalent shift in human circadian rhythms. More at Bright Light Therapy and Blue Light Therapy vs GreenLIGHT Therapy
NOTE: Blue light used for light therapy usually has peak emissions in the 470 +/- 10 nm range.
In North America, a no-risk rental program is available on some models. If the unit is purchased within 2 months from the time of rental, all rental payments are applied towards the purchase price. Order Now! Order Now!
The Sunnex Biotechnologies Lo-LIGHT phototherapy lamp comes with a five year warranty. Details