i think its 320 Watt Pulse Start Metal Halide......

Yep 320 watt PSMH but the colour

They went from low CRI white light to high CRI white light instead of going to crime orange.

I though they only offered the 115 up to 250 watt max.

i went to AEL's website and it shows a 320 Watt PSMH 115 is indeed avalible...

I don't believe high wattage PSMH is a problem in smaller fixtures, only HPS.....

The 115 is available in up to 400 watt HPS and yet for some odd reason according to there web site is only available in 250 watt MH or PSMH so maybe this was retrofitted with 320 watt PSMH but this tag is still to weird

how come HPS is sensitive to excess IR being reflected on the arctube?

wouldn't this be the cause of large wattages in small reflectors?

Today I saw a few new M400A3 fcos that have these weird red and white tags. I think they are 400w pulse start.

I still wonder if there will be a problem using a 320w lamp in a small luminaire. Physically the 320w lamp is the same size as a 175w or 250w lamp, but being higher wattage, more heat is produced and maybe that will cook the ballast? MH lamps get physically hot.

I somehow doubt that this bi-color NEMA tag is actually NEMA designated. Isn't the definition of a NEMA tag pretty much black numbers representing 1/10 of the wattage on a single color background? I personally would use an all red tag with "PULSE START TECHNOLEGY" on the bottom.

Nope, it IS NEMA designated....I saw them in stock in the shop in Local Electric Company, plus I saw those in one of the NYC bridges...the new fixtures where I live has those tags........

What exactly are all the NEMA designations, I know - blue = mercury, red = MH, yellow/gold = HPS, tan = LPS, red & white = PSMH and purple = incandescent. Are there any others or is that it?

I've seen whit tags on induction lights and green on LED, but I'm not sure if those are NEMA desiganted. I don't like the red/white PMH tags. They should be red and just say "pulse metal halide" or something. As far as i know, Cooper used red tags with PMH in the corner of the tag.

Replacement M-400 R3's in Bailey have these Red and white tags like this one, but they have MV lamps in them since IREA loves MV. I also saw tags like this in Louisiana in a city.

Uh then those mercury lamps are going to have a very short life on a PSMH ballast Are you sure they where coated PSMH lamps?

They were most likely coated PMH lamps. MV will work on the PMH ballast without the ignitor though. It might not last as long.

They probably took the ignitor out. I know they are MV because the color, I saw them lit at night and all of them even the MV fixture have the same bluish-green color, so I Know they are MV.

MH can have color variations, but they very well could have been mercury vapor.

There's also green tags for HPS in Canada, and I wonder if anyone made MH tags with PRMH for probe start and PSMH abbreviations for pulse start?

PRMH isn't used. I think it's just "MH" and pulse metal halide is "PMH"