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If an LED fixture has lower initial lumen output than a traditional HID light, how can LED claim to
When you average delivered lumens over the course of 60,000 hours, you'll see that LED outperforms a 400-watt MH lamp operated in a horizontal position. (60,000 hours is used for this comparison to show three full life cycles of the HID.)
The MH's lumen depreciation, as well as optical and ballast losses, quickly reduce output of the HID system. Note that there are three relamps over 60,000 hours.
Conversely, LED has significantly better lumen maintenance and a more efficient driver. Also note that the LED fixture typically doesn't need relamping from zero to 60,000 hours.
Combine this with Beta's exclusive NanoOptic and LED outperforms MH over the course of the life of the fixture.
Result: the LED's average delivered lumens is 74% higher than HID over 60,000 hours.