... (>80LM/Watt),and power factor LED driver.4. Integrative design for heating yield, which will guarantee a service life of more ... 50,000 hours.If it work for 12hours per day,then it can be used for over 10 years.5. It's ... ,dustproof,rustproof. environmentally friendly, no any harm for body.Application:they are design for :Tunnel, Football field, Stage, Buildings, Advertising Board, Gym, Stadium, Yard ...