LED High bay lights and low bay lights are very common and ideal for factories, warehouses, workshops, stadiums, shopping malls, supermarkets, gas stations and other indoor places lighting. 

LED High Bay Lights are designed to replace HID (High Intensity Discharge) Lamps.  The LED High Bay lights are 70% lower power consumption than the light it is designed to replace.

Use a 120W LED high bay light to replace a 400W HID lamp, for example, In a factory with 50 High Bays with lights operating 12 hours a day, 5 Days a week, the switch to LEDs would reduce their electricity consumption by 43 megawatt hours per year and reduce their emmissions of Carbon Dioxide by more than 46 tonnes  per year.

With a rated life of 100,000 hours the expected life would be 32 years at this level of use.  Energy Savings over this life time, even at a rate of 10cents / kWhr would exceed $120,000.