LED Plant Light PAR38 121x133mm. This lamp series promotes healthy plant growth in the absence of daylight. It enhances the natural colors of plants with a special light spectrum. The significant advantage is that the lamps emit negligible amounts of UVA and UVB. Energy efficiency class: not subject to labeling. Mercury content (mg): 0. Ignition time/Start time (s): >0.5. Luminous flux maintenance: 0.7.