CHIMEI LED Desk Lamp uses direct current which prevents flickering and requires no electric ballasts, thus largely reducing eyestrain and the risk of nearsightedness.
Direct Current for Flicker-Free Light Source The AC (Alternating Current) system is 110~240V/ 50-60Hz, which means for every second the electric current changes its poles 50 or 60 times. This causes 100 or 120 times of flashing and dimming per each second, a phenomenon known as “flickering”.
Most people underestimate the influence of flickering from a fluorescent lamp on the eyes.
Flickering can cause eyestrain. People may feel like rubbing their eyes under flickering lamps,and sometimes it will even worsen your sight,especially when the voltage of the electric current is low or unstable, the ambient temperature is low, or the lamp tube is old.