Sylvania e27 hsi mp metalarc wdlhigh output quartz metal halide lamp for use in open lights impresses with its excellent colour throughout its entire lifeusage areas display light in shops public areas eg a lobby bank halls and airport terminals floodlighting elliptical shape compact dimensions single ended e27 design enables maximum freedom for the designer light long lifespan of up to 15 000 hours clear or coated surface keeping it on continuously is not advisable turn it o