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Compact daylight MH lamp in operation Iwasaki of Japan made compact quartz metal halide lamps of unparalleled quality. Their ColorArc range of lamps featured a light color quality of 96 Ra8, achieved through advanced burner design. This HDR picture shows the cool-daylight "D" variant in operation, with a view on the arc burning in an atmosphere of mercury and metal halide vapors. The salt mix used here consists of iodides of dysprosium, neodymium and cesium, resulting in the emission of 6500 K light. A glass sleeve surrounds the burner to prevent a violent lamp rupture at end of life, and for additional safety the outer bulb is coated with zinc oxide to block UVs off. Keywords: Lamps

Compact daylight MH lamp in operation


Iwasaki of Japan made compact quartz metal halide lamps of unparalleled quality. Their ColorArc range of lamps featured a light color quality of 96 Ra8, achieved through advanced burner design. This HDR picture shows the cool-daylight "D" variant in operation, with a view on the arc burning in an atmosphere of mercury and metal halide vapors. The salt mix used here consists of iodides of dysprosium, neodymium and cesium, resulting in the emission of 6500 K light. A glass sleeve surrounds the burner to prevent a violent lamp rupture at end of life, and for additional safety the outer bulb is coated with zinc oxide to block UVs off.
20231230_123547.jpg HPL-HPI_comparison.jpg Eye_MT150D.jpg _IMG5906-m.jpg Hg-Ne.jpg
Lamp/Fixture Information
Manufacturer:Iwasaki (Eye)
Model Reference:MT150D
Lamp
Lamp Type:Quartz metal halide
Filament/Radiator Type:Thermal discharge in argon, mercury and metal halide vapors (Dy, Nd, Cs)
Base:E26
Shape/Finish:Tubular clear
Service Life:6 kh
Burning Position:Universal
Electrical
Wattage:150 W
Voltage:95 V
Current:1.9 A
Optical
Lumen Output:11.0 / 9.0 klm (initial / mean)
Lumen Efficacy:73.3 / 60.0 lm/W (initial / mean)
Colour Temperature:6500 K
Colour Rendering Index:96 Ra8
Physical/Production
Dimensions:152L x 40Ø mm
Factory Location:Gyōda, Saitama, Japan
Fabrication Date:Mid 1990s
Application/Use:Commercial and retail lighting
File information
Filename:Eye_MT150D.jpg
Album name:Max / Misc lamps and lighting
Keywords:Lamps
Filesize:713 KiB
Date added:08 Aug 2025
Dimensions:1000 x 1500 pixels
Displayed:13 times
DateTime Original:2019:11:07 20:49:31
Exposure Time:10/11 sec
FNumber:f/8
File Source:Digital Still Camera
Flash:No Flash
Focal length:66.2 mm
ISO:200
Model:X-T1
Software:Adobe Photoshop CS5 Windows
White Balance:0
URL:https://trad-lighting.net/gallery/displayimage.php?pid=941
Favourites:Add to Favourites

Comment 1 to 2 of 2
Page: 1

Ria   [Fri 08 Aug 2025 at 11:34]
Love the ColorArc range, the build quality is amazing.
Max   [Fri 08 Aug 2025 at 17:05]
Me too, I even have a small stock of those cool-daylight ColorArcs for a later usage. The beauty with their fill chemistry in that case is that those lamps can be operated at a lower power (i.e., to prolong life) without causing a nasty green shift in the emitted light color. Light remains white, albeit of a higher CCT, but that's not really an issue.

Comment 1 to 2 of 2
Page: 1