Low-pressure gas discharge lamp for influencing the body's melatonin budget

The invention relates to a low-pressure gas discharge lamp, which affects with its light in the red spectral biological circadian rhythm by controlling the melatonin secretion. The tubular glass discharge vessel, which may also be formed as a double helix is ​​filled with a noble gas or noble gas mixture and mercury. At both ends of the discharge vessel electrodes are arranged to feed energy. The discharge vessel is internally coated by several layers successively coated phosphor layers. The located on the glass surface first phosphor layer consisting of phosphor, both by the ultraviolet mercury radiation between 180 nm and 400 nm as well as by the light emitted by the mercury discharge blue radiation between 400 nm and 490 nm as well as by the emitted visible radiation of the second or further phosphor layers wherein visible light is generated with emission maxima in the range between 500 nm and 650 nm is excited radiation emitted between 400 nm and 550 nm. In conjunction with light sources for melatonin suppression, the low pressure gas discharge lamp is particularly suitable with warmer light in the absence of external conditions such as sunlight for the stimulation of the quasi circadian rhythm with the individual. Owing to their good color rendering and high energy efficiency, it meets all the requirements necessary for a light source for lighting tasks ...