NEMA wattage label

NEMA wattage labels are used on street lighting fixtures to indicate the wattage of the lamp for maintenance purposes.

Yellow sticker indicate the lamp is a sodium vapor lamp (HPS/LPS)

Blue sticker indicates the lamp is mercury vapor (MV)

Red sticker indicates the lamp is metal halide (MH)

Green where are also used on HPS units in Canada.

In addition to being colour coded, newer NEMA stickers also state the lamp type abbreviation in the lower right-hand corner (e.g. HPS).

"3" sticker—35 watts (HPS/LPS)-Uncommon
"5" sticker—50/55 watts (HPS/LPS)-Uncommon
"7" sticker—70 watts (HPS/PSMH)-Common
"9" sticker—90 watts (LPS)-Uncommon
"10" sticker—100 watts (MV/HPS/PSMH)-Common
"13" sticker—135 watts (LPS)-Common
"15" sticker—150 watts (HPS/PSMH)-Common
"17" sticker—175 watts (MH/MV)-Common
"18" sticker—180 watts (LPS)-Common
"20" sticker—200 watts (HPS)-Common
"25" sticker—250 watts (MV/MH/HPS/PSMH)-Common
"31" sticker—310 watts (HPS)-Uncommon
"32" sticker—320 watts (PSMH)-Uncommon
"35" sticker—350 watts (PSMH)-Uncommon
"40" sticker—400 watts (MV/MH/HPS/PSMH)-Common
"70" sticker—700 watts (MV)-Uncommon
"75" sticker—750 watts (HPS/PSMH)-Uncommon
"X1" sticker—1000 watts (MV/HPS/MH/PSMH)-Common
"X5" sticker—1500 watts (MH)-Uncommon

A label with a PS before the MH (i.e 17 PSMH) on a MH sticker indicates that the fixture utilizes the newer pulse start technology, which use different lamps than the older probe start technology.^[1]^[2]

References

^ "Hubbell Lighting" (brochure). Hubbell Lighting. 2009. p. 3. http://www.hubbellonline.com/wiring/killark/PDF/7SecL/L36-L41.pdf. Retrieved 2009-10-20.
^ "Pulse-Start Metal Halide Lighting". Natural Resources Canada. 2009. http://oee.nrcan.gc.ca/industrial/equipment/lighting-pulse/index.cfm?attr=24. Retrieved 2009-10-20.