HID Lamps Notes
HID Notes
= Product by a manufacturer other than Satco
S= Product by one of the Primary lamp manufacturers
ANSI Codes
All HID lamps and ballasts are identified by an ANSI code. The purpose of these codes are to make sure that the lamp from one manufacturer is properly matched to any other manufacturers ballast, therefore resulting in safe operation, and produce the designed light output. Especially with the increasing complexities of metal halide product offerings, it is very important that the ballast and lamp ANSI codes are matched before use. The most recent changes to the ANSI lamp codes have added the E, S, and O letter designations. For example, a 400 watt probe start metal halide lamp will have an ANSI code of M59/E, M59/S, or M59/ O. This should be used only on a ballast with an ANSI code of M59.
E - Lamps must be used in enclosed luminaires which meet the requirements of UL1598.
S - Lamps are considered “suitable” for open luminaire operation, only if operated in the vertical ±15° position. Lamps do not meet ANSI criteria for containment and must be turned off at least once per week for a minimum of 15 minutes if operated continuously. In addition these lamps must be group relamped before reaching rated lamp life.
O - Lamps can be operated in open or enclosed luminaires within the manufacturer’s specified operating position limits. This type meets the ANSI criteria for containment rated operation. Special exclusionary sockets are available for these lamps to ensure that the wrong lamp type is not used.
Rated Life
The rated life of metal halide lamps is based on the point when 50% of the lamps have burned out, based on a burn cycle of 10 hours per start. Various operating conditions affect lamp life. One key factor is operating position. Lamps designated universal can be operated in any position. However, life expectancy and lumen output are sacrificed in certain positions. Published “rated life” for universal lamps is based
on operation in the vertical position. “Rated life” for universal lamps operated horizontally is 75% of the published rating. Shorter operating cycles also severely reduce life. At operating cycles shorter than 10 hours per start, life will shorten as follows:
5 hrs per start: Life is approx. 75% of rating
2.5 hrs per start: Life is approx. 55% of rating
Initial Lumen Listings
Rated initial lumens are based on measurements at 100 hours of use, and are based on specified burning position. The measures listed for universal position lamps are based on a vertical burning position; horizontal usage decreases the output by 25 to
30%. For specifics on any particular lamp, call Satco customer service
Safety Warnings
It is the responsibility of the purchaser to read all safety warnings on the lamp package before use. For more information, call Satco customer service
HID lamps
Steps to choosing the correct Metal Halide lamp.
1)Determine the correct wattage.
2)Determine the base.
3)Choose the shape. ED and BT style lamps are generally interchangeable
4)Determine the correct size, some wattages come in multiple sizes. For example, 400w lamps are standard ED37, but are also commonly available in an ED28 compact envelope.
5)Determine burning position, BU, BD, Vertical, Horizontal, or Universal.
6)Determine Pulse Start, or Probe Start. Pulse Start is standard on lower wattage lamps, (39 through 150 watts). Probe Start is standard on higher wattage lamps, (175 through 1500 watts), however Pulse Start technology is being used more and more on the higher wattages.
7)Determine whether the project is calling for the newer Ceramic Arc tube lamps. These lamps offer higher color rendering, and Lumen Output than the more traditional Quartz Arc tube lamps.
8)Determine whether fixture requires an Open Rated (Protected) lamp, or an Enclose Rated lamp.
9)All Metal Halide lamps and ballasts are identified with an ANSI code. It is best to make sure that the ANSI code matches between the ballast and lamp.
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