More information on NEC fluorescent tubes and SPD variations: http://goo.gl/exR6g Peaks are present in LEDs "tubes" too, both are daylight simulators. In the green way of life, tungsten halogen, that seems to be better daylight simulators but less efficient, and are far to be A class.
From memory, better color rendering fluorescent tubes are Class B.
The LED industry has made an effort to cover the now fadding market of flurescent tubes due to enviromental requirements, and in the recent few years has developed good daylight simulators, enough to be normalized in graphic technology, and adopting previous comercial shapes and sizes. And is easy to DIY. There are a lot of photographers and video makers that are making use of relatively expesive fluoreecent tubes from Kino Flo, with silimilar SPD that those used in graphic tecnology. Some of those photographers have fear to use make use of flash units and hand held photometers for photography. ;) A fast look at SPD of different light sources: http://goo.gl/kGO91 LED is going to eat you, fluorescent baby.