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The Hamamatsu L6999-50 L2D2 Deuterium Lamp has a UV Glass window material with a guatanteed lifetime of 2000 hours. L2D2 lamps offer excellent features essential for light sources in analytical instruments such as long service life, high stability and high output.


  • High Performance Liquid Chromatography,
  • UV-VIS  Spectrophotometer,
  • Thin Layer Chromatography,
  • Atomic Absorption Spectrophotometer,
  • Film Thickness Gauge etc.


  • dimensional outline: "o" ,
  • Spectral distribution : 185 nm to 400 nm,
  • Aperture diameter : 0.5 mm,
  • Guaranteed life : 2000 h,
  • High stability, 
    • Fluctuation 0.005 % (p-p) Typ. (Equivalent to 2 x10-5 A.U.)
    • Drift +/-0.3 %/h


  • Small intensity variation,


  • Less movement of arc emission point.


Series L2-2000
Electrode Structure See-through
Window Material UV Glass
Spectral Distribution (Short) 185 nm
Spectral Distribution (Long) 400 nm
Aperture Diameter 0.5 mm
Output Stability Drift Max. +/- 0.3 %/h
Output Stability Fluctuation (p-p) Typ. 0.005 %
Guaranteed Life 2000 h
Required Discharge Starting Voltage Min. 400.0 V dc
Anode Current 300 +/- 30 mA dc
Tube Drop Voltage Typ. 80.0 V dc
Filament Warm-up Voltage 2.5 +/- 0.25 V dc, V ac
Filament Warm-up Current Typ. 4 A dc, A ac
Filament Warm-up Time 20 s
Filament Operating Voltage 1.0 +/- 0.1 V dc
Filament Operating Current Typ. 1.8 A dc


Current Stock:
HAM L6999-50
0.25 LBS
6.00 (in)
4.00 (in)
4.00 (in)
Manufacturer's Warranty: The manufacturer warrants its products to be free of detects in materials and workmanship for the stated period from date of original purchase invoice. All warranties or merchant ability and fitness for any purpose and all other warranties, expressed or implied, except those expressly set forth herein, are deemed waived and excluded. Manufacturer's duty under the warranty is limited to replacement and/or repair of the defective part at their exclusive option. Seller shall not be liable for any expenses or damages incurred by the purchaser except as expressly set forth herein, and in no event shall seller or manufacturer be liable for any special, incidental or consequential damages of any kind. This warranty does not supersede any statutory rights that may be available in certain countries. The foregoing manufacturer's warranty of shall be voided, and of no force and effect if buyer has modified or damaged the product.

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