The ALTSA Portable Forest Frog features high efficiency chipsets with a lifespan of >50 000hrs and can be widely used in the mining industries (shaft bottoms), Oil & gas exploration, drilling, petrochemical plants, power plants, and pharmaceutical plants as a portable lighting solution. The Forest Frog series features optional power consumption selections from 10W-15W with a high efficiency of 136lm/W. the long lasting battery lasts up to 6-10 hours after a full charge. engineered with robust aluminium housing and tempered glass lens, The ALTSA Portable Forest Frog Series is suitable for Zone 1, Zone 2,Zone 21, Zone 22 hazardous areas.