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Better picture of the arc of my Osram HQI-TS 70W/WDL pre-Excellence You can see that unlike FrontSideBus HQI-T 70W/WDL and Thorn-GE MBI-T Arcstream 150W, my plasma don't looks like an electric balls, but rather than a regular bowing upward arc, despite using the same Sn-In-Tl-Na halide chemistry as these lamps, and all of them are 3000K. Why?

Better picture of the arc of my Osram HQI-TS 70W/WDL pre-Excellence

You can see that unlike FrontSideBus HQI-T 70W/WDL and Thorn-GE MBI-T Arcstream 150W, my plasma don't looks like an electric balls, but rather than a regular bowing upward arc, despite using the same Sn-In-Tl-Na halide chemistry as these lamps, and all of them are 3000K.
Why?

IMG_1343.JPG IMG_1327.JPG IMG_1316.JPG IMG_1299.JPG IMG_1287.JPG
File information
Filename:IMG_1343.JPG
Album name:dor123 / Lamps
Manufacturer:Osram, Germany
Type/Model:HQI-TS 70W/WDL
Wattage:70W
Date manufactured:1987
Filesize:835 KiB
Date added:16 May, 2026
Dimensions:2048 x 1536 pixels
Displayed:3 times
URL:http://80.229.24.59:9232/gallery/displayimage.php?pid=24952
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