They look along the lines of Reeflux 12ks (which I have in Lumenbright reflectors with Coralvue eballasts--white with a nice blue hue) IMO...but I saw them on an electronic ballast which will not drive them to spec (so they may look more white on a proper M80). They are also suppose to be equivalent to the Phoenix 14K DE (which I have also had on the M80 these are white with the nice blue hue) bulbs.
And from what I've read Gastone is correct...without the proper M80 ballast you will experience shorter bulb life (9 months or so vs 12-18 months with the M80) because you will be underdriving the bulb quite a bit.
