As a network TV engineer in Hollywood, one of my challenges was going from NTSC TV standards to ATSC TV standards, or simply Hi Def TV ! We removed the old ones and installed the new ones. In HD viewing rooms, we follow the SMPTE RP-166-1995 standard for viewing room lighting. The gear we buy is expensive, but it works. What does that have to do with the above. Well, the color temperature of the system is 6500 Kelvin. The lamps I am reviewing here are 6500 Kelvin. With a $10 lamp and theseβ¦