... temperature -20 to + 60 degree Celsius Features:1.Super bright light output & well controlled beam angle;2.Special circuit design, each ... to affect the normal work of the entire lamp.3.led light source to achieve a lower power consume,energy saving.4 ... ;4. Commercial complexes;5. Factory, plant, warehouse, office, production line.6. Supermarket, department store 7. subway station,bus,train and so ...