Their switching performance degrades rapidly above 15 Hertz or so. Incandescent bulb glasses are usually made with a translucent shield over the bulbs, allowing the glasses to be used with the eyes open. Incandescent glasses do not have a polarity. The Photosonix LumaSoft incandescent white light glasses are no longer available, they are replaced with the TruWhite glasses. LED glasses Until early 1998, LEDs were always monochromatic, with red and green the most common colors and yellow and orange as options.
Some people find red harsh, even with the intensity turned down, and as a result prefer green.
Some manufacturers have mixed LED colors in an effort to approximate broad spectrum light. Enclosed here is the list of manufacturers and models with the polarity information. IQ 1,2,3 and Jr. model. The red is still the basic color, red LEDs provide a wide range of visuals for majority of people. They are less bright than the red and thus more soothing for some individuals.