| Lamp/Fixture Information |
| Manufacturer: | Osram Sylvania |
| Model Reference: | MS400/PS/BU-Only |
| Lamp |
| Lamp Type: | Quartz metal halide |
| Filament/Radiator Type: | hermal discharge in mercury and metal iodide vapors (Na, Sc) |
| Base: | E39 |
| Shape/Finish: | Bulged tubular clear |
| Electrical |
| Wattage: | 400 W |
| Voltage: | 133 V |
| Current: | 3.24 A |
| Optical |
| Lumen Output: | 44,500 lm (nominal, initial) |
| Lumen Efficacy: | 111 lm/W (nominal, initial) |
| Colour Temperature: | 3766 K (nominal) |
| Colour Rendering Index: | 65 Ra8 (nominal) |
| File information |
| Filename: | Sylvania_MS40021PS21BU.jpg |
| Album name: | Max / Spectra |
| Keywords: | Miscellaneous |
| Filesize: | 488 KiB |
| Date added: | 22 Feb 2025 |
| Dimensions: | 1500 x 2041 pixels |
| Displayed: | 97 times |
| Software: | Adobe Photoshop CS5 Windows |
| URL: | https://trad-lighting.net/gallery/displayimage.php?pid=685 |
| Favourites: | Add to Favourites |
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Search![Sylvania MS400/PS/BU
The spectra shown above were measured from a Sylvania MS400/PS/BU (already presented [url=https://trad-lighting.net/gallery/displayimage.php?pid=237]there[/url]) run under various conditions. This sodium-scandium lamp is designed for an operation in the cap up position and features the best performance in the 400 W quartz MH lamp class with an initial lumen efficacy of 111 lm/W. The two spectra at the top corresponds to an operation at 400 W with the cap down (upper spectrum) and cap up (lower spectrum), showing how strong the impact of burning position is on the lamps characteristics. The two spectra at the bottom correspond to an operation in the cap up position at lower input power, showing the shift towards a cooler emitted light color.
Keywords: Miscellaneous](images/image.gif?id=282144069087 "Click to view full size image
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Sylvania MS400/PS/BU
The spectra shown above were measured from a Sylvania MS400/PS/BU (already presented [url=https://trad-lighting.net/gallery/displayimage.php?pid=237]there[/url]) run under various conditions. This sodium-scandium lamp is designed for an operation in the cap up position and features the best performance in the 400 W quartz MH lamp class with an initial lumen efficacy of 111 lm/W. The two spectra at the top corresponds to an operation at 400 W with the cap down (upper spectrum) and cap up (lower spectrum), showing how strong the impact of burning position is on the lamps characteristics. The two spectra at the bottom correspond to an operation in the cap up position at lower input power, showing the shift towards a cooler emitted light color.
Keywords: Miscellaneous")
