Sunrise alarm clocks allow your eyes to absorb light through your eyelids, allowing you to wake up gradually. It also provides a dose of light therapy, which is used to treat various forms of depression, as well as sleep disorders. “These devices are basically alarm clocks that you set to mimic the sunrise,” according to family medicine practitioner Robert Cain, MD of the Cleveland Clinic. “They don’t emit UV rays and have equal efficacy to sun lamps. For maximum benefit, set the clock to resemble a sunrise in June or July.”