the use of mercury resonance radiation into elecical energy to radiant energy, but because of this resonant line in the ulaviolet region, must use a second phosphor time quantum conversion to become a visible, while the second quantum conversion efficiency of only 46%, while the phosphor absorption and the exaction rate of decline in the quantum, the quantum conversion process in two consecutive fluorescent light effect to limit the 90 ~ 100 lm / w or so, according to the current sucture and materials are limits difficult to over 120 lm / w. it is also worth noting that in a conventional light source light emitting center of the center of optical radiation in the 4π solid angle in the uniform disibution, consistent with the radiation of space, quantum exaction rate of nearly 100%. led light source is a solid plane, only outward (2π solid angle or smaller angle) of the photons can be emitted, so the conventional led within 50% of the photons inside the chip most of the lost heat, quantum exaction rate is very low.
led writing boardwavelength of the consistency of quality and design different from aditional incandescent lighting, the other aspect is the conceptual design of lighting all the comforts they are used in specal analysis and light simulation software and prototyping systems have been before the actual confirmed.
led neon sign fluorescent lamps and ordinary fluorescent light failure comparison chart, we can see that the semiconductor and general fluorescent lamps is not much difference. figure 5 is a different color led and semiconductor comparison fluorescent light failure, which can be seen that the semiconductor does not have the led lamps have many advantages of the. figure 4, semiconductor and general fluorescent lamps compared lumen led in different colors in figure 5 and the more general failure of semiconductor fluorescent light from the blue fluorescent filament after the semiconductor junction to replace common fluorescent lamps does not have many advantages: 1: if the heat of problem solving well, the absence of semiconductor fluorescent filament, much longer than the life of ordinary fluorescent lamps. 2: you can often switch to start.
led signs
