METHOD AND APPARATUS FOR MAINTAINING CONSTANT COLOR TEMPERATURE OF A FLUORESCENT LAMP

摘要

A system to allow a fluorescent lamp to be dimmed or otherwise improve colorperformance of the lamp whilemaintaining a constant spectral distribution In one embodiment, the lamp willdim in light output and not shift in colortempera-ture. An LED array is positioned under a fluorescent lamp such thatits light injects back into the lamp that part of the colorspec-trum that diminishes as a fluorescent lamp dims The LEO array ispositioned centrally along the underside of the lamp The lightfrom the LED is never directly visible but shines through the lamp, the lampacting as a diffuser The brightness level of the LEDscan be determined as a preset level relative to a predetermined dim setting orcan be regulated through an electronic monitoringsensor