21. The perforated metal panels are lit from below with white, green and black fluorescent tubes . 22. Tachistoscopes used dc powered fluorescent tubes with electronic controls. 23. That would be the art of Dan Flavin, the American avatar of the fluorescent tube . 24. The lighting was redone with gels over fluorescent tubes . 25. A broken fluorescent tube will release its mercury content. 26. The marquee was also back-lit using fluorescent tube lighting. 27. But thanks to advances in triphosphor chemistry, color-correcting fluorescent tubes now provide a warmer light. 28. So LEDs seem the best for smaller torches, fluorescent tubes for larger battery powered area lighting. 29. In this sequence they are also dancing with the dancers but with white fluorescent tubes , too. 30. Scintillators generate light in fluorescent tubes , to convert the ultra-violet of the discharge into visible light.
