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Last-gen Osram HQI-BT 400W in operation
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Shown here is a later (2019), made-in-Slovakia version of the Osram HQI-BT 400W presented in its original form there. The getter is different, an UV enhancer was added to compensate for the removal of 85Kr from the burner, the latter was fully optimized for an operation solely on HPS ballasts, and still it operates quite nicely at lower current (shown here at 3.5 A). In 1991 Osram was the first company to release a metal halide lamp suitable for a dual low- (3.5 A) and high-current (4.0 A) operation on mercury and sodium lamp systems. This was achieved by optimizing the burner design and its fill chemistry, resulting also in a light source suitable for an operation at all positions. While Philips and SLI Sylvania eventually caught up with dual-operation MH lamp series of their own, the HPI(-T) Plus and the HSI-(T)HX, they never managed (or intended) to make them as flexible position-wise.
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Search![Last-gen Osram HQI-BT 400W in operation
Shown here is a later (2019), made-in-Slovakia version of the Osram HQI-BT 400W presented in its original form [url=https://trad-lighting.net/gallery/displayimage.php?pid=388]there[/url]. The getter is different, an UV enhancer was added to compensate for the removal of 85Kr from the burner, the latter was fully optimized for an operation solely on HPS ballasts, and still it operates quite nicely at lower current (shown here at 3.5 A). In 1991 Osram was the first company to release a metal halide lamp suitable for a dual low- (3.5 A) and high-current (4.0 A) operation on mercury and sodium lamp systems. This was achieved by optimizing the burner design and its fill chemistry, resulting also in a light source suitable for an operation at all positions. While Philips and SLI Sylvania eventually caught up with dual-operation MH lamp series of their own, the HPI(-T) Plus and the HSI-(T)HX, they never managed (or intended) to make them as flexible position-wise.
Keywords: Lamps](images/image.gif?id=661460705648 "Click to view full size image
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Last-gen Osram HQI-BT 400W in operation
Shown here is a later (2019), made-in-Slovakia version of the Osram HQI-BT 400W presented in its original form [url=https://trad-lighting.net/gallery/displayimage.php?pid=388]there[/url]. The getter is different, an UV enhancer was added to compensate for the removal of 85Kr from the burner, the latter was fully optimized for an operation solely on HPS ballasts, and still it operates quite nicely at lower current (shown here at 3.5 A). In 1991 Osram was the first company to release a metal halide lamp suitable for a dual low- (3.5 A) and high-current (4.0 A) operation on mercury and sodium lamp systems. This was achieved by optimizing the burner design and its fill chemistry, resulting also in a light source suitable for an operation at all positions. While Philips and SLI Sylvania eventually caught up with dual-operation MH lamp series of their own, the HPI(-T) Plus and the HSI-(T)HX, they never managed (or intended) to make them as flexible position-wise.
Keywords: Lamps")
