i bought eight 4 Watt LED Tube to replace the 50 watt ordinary light bulps. But they seem to overheat and go off after 10 minutes or so , they flatter a bit too after a while. They need about 12volt and the “base” i put the lamps gives about 20 volt if thats the problem than how to solve it?Are you saying that you bought some 12 volt LED lamps and put them into a fixture that outputs 20 volts? Yes that is the root of your problems. You are over driving your LED lamps and they are shutting down due to overheating. It is amazing they are still working at all. You will need to lower the voltage to the 12 volts that the lamps are rated for. How would you do that? Impossible to say without knowing what kind of fixtures you have.
Toshiba DLP screen problem?My Toshiba 52hm95 screen flickers blue. This is very noticeable on skin tones. Is this a lamp, color wheel problem or something else?There are no LED (blink) indications.It’s not the lamp. It could be the color wheel or light engine.
Try unplugging the TV for a few minutes/hours and see if that helps. If it doesn’t, you’ll need to contact Toshiba for further assistance!
What impact do you think the rise of LED lighting will have on the problem of light pollution?There seems to be two sides to the argument.
One is that LED lighting, being much cheaper to use, will allow people to pollute more and not have to worry about the environmental and/or financial impacts of doing so, which will make light pollution worse.
Conversely LED lighting is much more precise and is easier to use directionally and keep it pointed down. Also, since it doesn’t require the extended recharge times when you turn them on as compared with sodium lamps and other more conventional lights, they will be more practical to use in applications like infrared proximity lighting.
Personally I think led strip lights will decrease light pollution, but perhaps I’m just being naive and thinking that way just because I want to think that way, to make myself happier. What do you think? What other factors do you think I might not have considered here?
The requirements for illumination do not change for the source that is used, be it LED, fluorescent, sodium, or incandescent lamps. People still need a certain amount of light to see, ffectively. Street lights still need to put out a certain amount of light to illuminate the streets to allow for safety, etc.
Switching to LED Fluorescent will not cut down on light pollution. In the future, cheaper LED lighting costs may increase the useage of LED lighting for outdoor use, which may actually increase light pollution. However… sodium lamps are still far more efficient than the current LED technology and will be for a few years. Even when best led light bulbs become more efficient than sodium lights, they will still have to become cheaper in order for governments to switch over and start adding more outdoor lights. This may take decades.
