I just bought an 8 pack of LED nightlights from costco and they use a diffraction grating and an almost frosted look on the outside. They are not lighting up a room but they are very comparable to incandescent nightlights that I have used in the past. The 8 pack cost me about $9 and should save me much more than that cost in just one year of use.
Price depends on the application and the materials used... Movie theater projection bulbs are quartz enclosed xenon gas and very expensive - sometimes running to $800 or more for a large screen. And they STILL burn out after a year or two. They're all standardized too, our projectors from the 1950s take the same bulbs as our projectors from 2005. They're just not common enough to be cheap. LED light sources could dramatically reduce the price of powerful single direction lighting and diffuse lighting as long as they are mass produced.
I live in wilmington and there are tons of notices about the switch to digital every day, and I have cable. They also have trials where they turn off the analog signal and transmit a message that says "if you can see this message you will need to upgrade your tv set by the switchover date." Anyone who watches tv knows that this is coming.
Slashdot Mirror
I just bought an 8 pack of LED nightlights from costco and they use a diffraction grating and an almost frosted look on the outside. They are not lighting up a room but they are very comparable to incandescent nightlights that I have used in the past. The 8 pack cost me about $9 and should save me much more than that cost in just one year of use.
Price depends on the application and the materials used... Movie theater projection bulbs are quartz enclosed xenon gas and very expensive - sometimes running to $800 or more for a large screen. And they STILL burn out after a year or two. They're all standardized too, our projectors from the 1950s take the same bulbs as our projectors from 2005. They're just not common enough to be cheap. LED light sources could dramatically reduce the price of powerful single direction lighting and diffuse lighting as long as they are mass produced.
I live in wilmington and there are tons of notices about the switch to digital every day, and I have cable. They also have trials where they turn off the analog signal and transmit a message that says "if you can see this message you will need to upgrade your tv set by the switchover date." Anyone who watches tv knows that this is coming.