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Difference between revisions of "Philips HPI Plus"
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== Best retro purpose == | == Best retro purpose == | ||
Metal Hallide lamps are still widely used on commercial, industrial and architectural lighting but in these applications LED lamps are quickly replacing them due to much better performance, lower energy consumption and easy servicing. Light appearance is coll white or daylight, depending on lamp model, with good colour reproduction and low ultraviolet emission. The lamp can be used indoors as well as outdoors, when intense lighting is required as most surrounding look quite pleasing being light with new lamps. | |||
Exterior lighting is a good application | Exterior lighting is a good application as most gardens and outside areas are well showcased. The lamp themselves do release some heat meaning that closed fixtures are not well suited if not specifically built for this purpose. Care should be taken when using these metal-hallide lamps as they are sensitive to the operating position especially when inside enclosed fixtures. Improper heating of lamp can destroy it prematurely and present a safety hazard so special precaution should be exercised. While lamp warm up time is low, with the lamp achieving high output quite quickly, they are slow to restart, 10 minutes pauses not being uncommon. | ||
While products that have an internal ignitor are easier to operate, they are quite rare | While both high pressure mercury vapour and high pressure sodium gear and fixtures can be used, the lamp works closer to designed parameters when used with inductive ballasts for mercury vapour lamps and a suitable ignitor added on the circuit as required. Compact, boxy symmetric and asymmetric fixtures were popularly. Clear lamps are well suited to high efficiency reflector fixtures while coated lamps work better in open luminaries or classic mercury vapour fixtures. | ||
With adequate care and good ventilation, HPI metal hallides can be used vertically, in a freestanding position as mercury vapour lamps but lifetime will be reduced. HPI-T lamps are much more sensitive to operating position. Lamps age differently and this means that a series of lamps may exhibit different colour intensity and light intensity depending on wear and group replacement should be considered to maintain uniformity. Just as well, lamps should be replaced as soon as light and colour uniformity is affected, as old lamps present a higher risk of catastrophic failure. | |||
While products that have an internal ignitor are easier to operate, they are quite rare. Also, these lamps may be less reliable than standard ones that do not include internal ignitors since the ones being supplied are built to a lower quality standard and made to a set cost and space constraint. | |||
== Understanding manufacturer data == | == Understanding manufacturer data == | ||