Our LED Flood light or tower crane lamps adopt quality LED Chip, such as Philips or Bridgelux chip, single side lighting and the light is emitted through professional lens, and there is few luminous flux loss. Regarding professional photoelectric test report, lighting effieincy is higher than 120LM/W, then 72,000 lumens for our 600W LED lamps, so we say our 600W LED lamps can equally replace 2000W mental halide lamps.

For example:

Power x lighting efficiency = total lumens

600W x 120LM/W = 72,000Lumens

Sencondly, another misconception is that compared with LED lamps, metal halide lamps are relatively cheap on the basis of brightness meeting the requirements. In fact, this is only reflected in the purchase price. We buy goods for use, the value of use for 2000W metal halide lamp has no advantage over LED tower crane lamp.

Take a lamp as an example, each lamp works 10 hours a day, and the electricity fee USD0.2 per KWH. 
By the comparison of electricity charges showing in the table as following, one LED flood lamp can save US$1008 than a 2KW metal halide lamp, which is not including maintenance cost of the metal halide lamp and the cost of bulbs replacement.