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XM 250 Watt 20,000K Double Ended HQI MH Bulb.

Product #LT-XMDE250-B

Availability: Temporary not available

Description: XM 250 Watt 20,000K Double Ended HQI MH Bulb.
Brand: XM

Product Information

XM 250 Watt 20,000K Double Ended HQI MH Bulb.

The XM 20,000K is the preferred lamp of many well known coral farmers and distributors. The 20,000K produces a deep blue appearance that brings out color like no other spectrum. This lamp creates a look similar to those found on deeper levels of the coral reefs.

When XM Lighting began in 2003, they took the hobby by storm with high PAR levels, high quality of lamps and world class customer service. They quickly became the hottest selling lamp in the hobby. They have continued the trend by developing new lamp wattages and color temperatures to meet the changing demands of the hobby.


What is XM lamp life?

Lamp life varies depending on various operating conditions. Some key variables are lamp operating positions, duty cycle, line voltage regulation and ballasts operating characteristics.

Rated life is a statistical mean life.

XM400W is rated 6,000 hours based on 10 hours on 1 hour off duty cycle.

Shorter duty cycle will affect lamp life and performance.

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 70% of the lamp rated life.

Rated Life:

Rated, or average (median), life for metal halide lamps is a value of lamp life expectancy based on laboratory and field tests of representative lamps, operating on approved ballasts, with a burn cycle of at least 10 hours per start. The average life is determined when 50% of traditional metal halide lamps initially installed are still operating.

What type of ballast is recommended for XM lamps?

250W Double Ended Bulbs should use a 250W ANSI M80 rated ballast

What is the burn in period for XM lamps?

Recommended time for lamp seasoning is 100 hours this is the recommended time per IESNA standard LM 54 91. Seasoning of the lamp will allow time related changes in the colorimetric, and/or electrical characteristics to become stable. The greatest rate of change in the operating characteristics of a MH lamp generally occur during the first hours of operation.

  • Weight: 0.5 lb
  • Height: 8 in
  • Width: 2 in
  • Depth: 1 in
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