About 15-16 years ago, I was given a PHILIPS 250w  lamp, but the catalog number had an extra character at the end.  The Utility company who serviced us on the MS Gulf Coast was a Touchstone Energy Co. Singing River Electric Power Association.  They generally used PHILIPS lamps, and Fisher Pierce PE Controls (sometimes, they used LAMPAS, Area Lighting Research, and believe it or not, I got my particular office to try DTL for the first time, but they used Fisher Pierce 90% of the time).  One day, one of the journeymen gave me a lamp that instead of being marked with the standard C250S50 was marked witb C250S50/C.  I found out the extra C stood for Comfort.  Well, I tried it out in my GE M250-R2, and I didn't notice any difference in the color temperature at all.  Having done a little research, I have determined that this particular lamp -SHOULD- have more of a higher color temp, to be a little whiter.  The ceramic arc tube is a tad bit shorter than the standard C250S50 arc tube.  So can anyone explain this to me?  I am frankly stumped.

Also, can anyone tell me when this lamp was manufactured? It appears to have a date code of 9H-1.

Maybe it gets into the hotter running mode only on some types of gear ?

I ran it on a M250-R2 which is an M2RR25S0A2GMS3358.  The same luminaire used by SREPA and Ameren Illinois. SREPA actually uses Cooper and AEL luminaires as well as the GE luminaires.  Sometimes they use all 3 at once.  One day, when I was 16, they were doing mass repair on the highway (installing new lamps and luminaires) and I watched them install M250R2s, AEL 113, AEL 125, Cooper OVS, and Cooper OVX in one day.  Talk about a Hodge Podge operation.  When they first installed the lights in early 1993, (2 lights per pole, 27 poles installed) they were ALL AEL125s with 1992 Fisher Pierce 6662N-ESS manufactured in 11-92

Deluxe HPS lamps, can be operated on regular HPS gear. So if you run your 250W Comfort lamp on S50 ballast + ignitor, it should have a whiter color.

I have a GE "Deluxe" color HPS lamp sometimes you can tell the difference--other times not.And when you turn the lamps off-the arc tube on the Deluxe lamp does run hotter and is shorter.Mine is 250W.

I have a GE "Deluxe" color HPS lamp sometimes you can tell the difference--other times not.And when you turn the lamps off-the arc tube on the Deluxe lamp does run hotter and is shorter.Mine is 250W.

The De Luxe Sodium lamps needs to be operated in thermally enclosed fixtures as to get the intended increase of the colour temperature. Also when new or moved in to another position they need some couple of hours to stabilize.

Mine is being burned in an enclosed fixture-when you take the enclosure off-no difference even after a few hours.