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This newest Litebook features a custom lens and diffusion system, a multiple-setting timer (15-30-45-60 minutes), and a long-lasting built-in rechargeable lithium-ION battery with a charge indicator. Like the original, it is a small (12.5 x 12.5 x 2.5cm), light weight (225g), and highly durable light emitting diode (LED) lamp used to treat Seasonal Affective Disorder (SAD), Winter Blues, fatigue and sleep disorders. Its LEDs are rated to last up to 100,000 hours, and are encased in an impact-resistant ABS plastic outer shell. The Elite comes with an AC Power Adapter, and has a 60-day money-back guarantee and a two-year warranty. Although not as bright as some SAD lamps (5,000 LUX at 20cm), the Elite produces light with a peak in the range (465 nm), that has been found most effective in suppressing melatonin production, thus reducing typical exposure times to 15-20 minutes/day.
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