... industry,petrochemical industries,swimming pool areas,dusty humid and corrosive environments,washing houses,breweries,under canopy ... double tubes,or LED-tube.7.Wattage : T8 series ---- 1*18W,2*18W,1*36W,2* ... 36W,1*58W,2*58WT5 series ---- 1*14W,2*14W,1*28W,2 ... Electrical equipment : firstly quality inductive ballasts,starters and capacitor or electronic ballast (upon request).11.Wiring : copper ...