The remaining blue light, when mixed with the yellow light, results in white light. New phosphors are being developed to improve color rendering as shown in Figure 5. Figure 5.
How Long Do Parakeets Live? Parakeets tend to live 10 to 14 years, if in good health. Not all will live that long, however, since parakeets can fall ill even with proper care. Improper care can shorten their lifespan to a mere 4 years or less. Consider these parakeet care tips.
it seems like many people have their parakeets/budgies for 5-7 years, maybe 10 if they are lucky. But it seems like they can live up to 15 years if they are healthy, eat a good diet (like harrison'spellets and some seeds & veggies/fruits), and live in an environment free of scented sprays, candles, and other irritants to the lungs. (BTW, those are not healthy for people to breathe either) 20-25 years.