Yes. The purpose of the lights was to suppliment lights that were low in the blue spectrum. Back then, ,"olden days" we only had MH with about 5000K. Some fluors's were 6500K. JB (John Burleson) the American Reef God was th first to use them. They came from the photgraphic industry. Later came the 5500K Venture MH, to replace lower K MH and 6000K MV. Two or three years later I helped Dr. Perry Thraser, from Light Sources, introduce his Tri-Phosphor fluoro's in the late 80's. You know, the ones that everyone sells with the built in relector, they were all made by his company. They also make actinics. Shortly after, I introduced the Iwasaki MH
Still King of the MH. And Perry's lights are still being sold by the ton. These lights were first introduced/sold by Ultraviolet Resources International, along with the Vossloh waterproof end caps I found. No, I did not make any money, I just wanted this stuff avalible to the hobbist. UR does not make lamps, many of their lamps are LS with their name on them, just as other Tri-Phosphor lamps made by LS have their name on them.
Ligfht Sources Ultraviolet Resorces International