Self-ballast metal halide lamp 400W working mode with the advantages of simple structure, less used equipment, good light color and so on has become a popular hotspot in the lighting field in recent years.
Features of direct ballasts metal halide bulbs:
Self-ballast metal halide lamps do not require additional ballast but have better color rendering and higher brightness.
400w direct Metal halide lamps E40 Tubular/Elliptical
High Intensity Discharge Lamp
What is mean Economic Life
Economic life refers to the hours of operation during which a lamp is designed to provide optimum light output and color quality as well as lowest replacement cost. Economic life describes actual lamp life better than rated life because rated life does not account for the lumen depreciation and color shift that occur as lamps age. The economic life of lamps is generally 60% to 75% of the lamp rated life. Though economic life is important when considering in a lighting system, lamp data tables show rated life because they provide a comparison with other lamp manufacturer’s rating.