LED bulb prices are still coming down, but the general public is still not aware of the advantages and still think the prices are too high. And the public is still unaware of the long term savings in electricity from which they’ll benefit. I still see 60 and 75 watt incandescents in dollar stores, which
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I found some soda straws that are thin and about the same color blue as the blue LEDs I got from goldmine-elec.com. I got the idea of using a soda straw from Quantsuff at quantsuff.com. He used two white LEDs in the ends of a short length of white translucent (semitransparent) soda straw to give
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I was asked to fix a Himalayan rock salt crystal light to make it brighter. These lights are larger (and heavier) than a 1 liter bottle. The salt is kind of a rusty red due to iron dissolved in the salt. There are many examples of these if you search for Himalayan salt light. The
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I stopped by to see the guys at my ex- work. One guy told me they noticed the furniture had been moved around, and some metal shavings on the tables. He looked up and saw that the fluorescent tubes had plastic clamps holding them in with sheet metal screws. But he didn’t notice one thing:
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Paul sent me a link to a Wikipedia article, http://en.m.wikipedia.org/wiki/Kruithof_curve which is new to me. I was introduced to some other illumination terms such as correlated color temperature by the website donklipstein.com which has a wealth of info on lighting and LED lights. Before CFL and LED lights, we were using incandescent lights which have
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I left the Nichia LED on the power supply overnight, at about 85 to 90 mA, and it didn’t seem to have any problem. I decided that I had to design a circuit to drive it from a low voltage, such as two AA rechargeable cells. I drew up a circuit, which had two transistors
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I received my order of four LED lights made by Philips yesterday. They’re called SlimStyle, but they look like lollipops. It’s 2700 K warm white, 800 lumens and 10.5 watts. The model # is 9290002707. It’s also known as Philips 433227, but I don’t see that on the package. I screwed it into a lamp
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When I go to the big box stores I usually stop look up the flashlights to see what’s new. I often see a palm sized flashlight with 27 LED’s, 24 of them on the flat side. The case is rounded on the corners and is typically yellow and black; the price is about $4 or
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I took apart a “Type R” LED light, which is a substitute for a wedge base auto light used in instrument panels and dome lights. This light has an 8 mm diameter LED and a 560 ohm, 1/8 watt resistor in the wedge base. Assuming that the LED drops 3.2 volts and the auto’s battery
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I think that, with the price of LED light bulbs coming down to commodity levels and their long life, the CFL bulbs will become more difficult to obtain. The LED lights are more efficient than CFLs or incandescent bulbs, and there has been a steady increase in Efficiency over time, which will probably continue. Someday
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