2009-04-01 P & R Packet - Laserfiche WebLink

Home Browse Search

HPS has a CRI of 22; Sol LEOS have a CRI of 80. HPS uses mercury as a starting gas - a disposal hazard. LED lamps vs. Low Pressure Sodium (SOX) SOX lamps produce a great number of lumens per watt. however it is monochromatic light and provides no color rendering at all. it takes 4 times more of this light to see and feel secure than white light. The life of SOX is only 8-10.000 hours or about 2.5 years. SOX has a CRI of 0, Sol LEOS have a CRI of 80. SOX use mercury as a starting gas - a disposal hazard. LED lamps vs. Mercury Vapor These lamps consist of a quartz tube filled with pressurized mercury gas. light produces when an electrical current passes through the mercury vapor. like all such high intensity discharge (HID) lamps, a "ballast" is required to start and to operate the lamps at the correct voltage levels. The chief drawback of the Mercury Vapor lamp is low lumen maintenance. These lamps loose their brightness much faster than other discharge style lamps. LEOs have much longer life and a higher initial Lumen output. This lamp type is not used much because there are many other lamp choices that outperform mercury vapor. Mercury Vapor uses mercury as a starting gas - a disposal hazard. LED Lamps vs. Metal Halide They produce light when an electric current flows through the gas within the lamp envelope. They are about twice as efficient as mercury vapor lamps. They have better lumen maintenance but are not very efficient. like other discharge lamps, this style is not efficient at low wattages, unlike solar powered applications, which are more efficient. The life of a Metal Halide is only 8-10,000 hours or about 2.5 years. Metal Halide uses mercury as a starting gas - a disposal hazard. LED Lights in Sol's Cobrahead Fixture - 13