This is a Kino Flo 6.6" 26W Kino KF55 True Match Fluorescent Lamp. The True Match Series of lamps has been produced to meet the high standards of both film and digital media. They are unique in their design since they are manufactured to synch with the precise spectral sensitivity of these media. Using this lamp negates the need of having to guess at the color temperature or scramble for the proper lighting filtration.
For the last 20 years, Kino Flo has led the field in solving lighting issues for the film and video industry. Their high-output but cool fluorescent fixtures are now an industry standard on production stages around the world.