Archive for the ‘Lighting’ Category:

2021-08-25 LED Streetlights Are Killing Moths In England

LED streetlights are decimating moths in England. The LEDs have blue light which insects use to see. The moths are pollinators like bees plus they’re food for many animals. There are a number of solutions for mitigating the problem. The blue light can be filtered out, among other things. My thinking is that the streetlights

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2020-08-03 Wireless Power Transmission In NZ

2020-08-03 article says it uses the industrial, scientific, medical frequencies. Tesla Redux! << NZ to trial world-first commercial long-range, wireless power transmission >> https://newatlas.com/energy/long-range-wireless-power-transmission-new-zealand-emrod/

2020-06-05 UV-C Germicidal Lamps Real Or Fake Banana Test

Clive tests three UV-C germicidal lamps to see if they are really putting out UV-C sterilizing light in this 3 minute video. He uses the green banana test. It’s obvious how the cheap LED lights don’t put out any germicidal UV-C. The UV-C wavelengths are blocked by regular window glass or the clear epoxy used

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2020-05-29 CoViD19 Lessons From Japan

This article has some very important lessons from Japan, which has 45 times *lower* CoVID19 cases than the US. https://news.yahoo.com/lessons-from-japan-on-containing-coronavirus-could-help-us-reopen-safely-160105489.html Quote: “In the absence of lockdown restrictions, public health guidance will matter more than ever. People want to know what the rules are — and why they should follow them. As for the rules, there

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2020-02-21

I found that 100 uH was a good all around value for these solar garden light circuits. But at the time I made these around 2009 the 5252 4 legged chip was uncommon and almost all the garden lights used 2 discrete transistors. I don’t know why they started using the 4 legged 5252 –

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LED Indoor Motion Sensing Lights – Decrease On Time

I bought two of these motion sensing LED lights for my hallway. They have a rechargeable cell that is charged through a micro USB port. To see one inside watch big Clive’s YouTube video – the ebay link to buy them is in his description. The charge lasts for more than a week with frequent

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2020-02-08 60 LED Solar Lights Stopped Working – Dead Diode!

From FB group electronics hobbyists Over the holidays I installed two solar 60 LED lights I bought on eBay. They stopped working just a few weeks after. I finally got up on the ladder and took them down to see why they died. Well, spit! The solar panel is plugged into the jack on the

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2018-07-30 How Are LED Lights Made Dimmable?

From FB comment to Bill Sherman’s candelabra lamps. Bill Sherman Sometimes I wonder what is meant by dimmable. If a LED light uses hundreds of microfarads for the DC filter capacitor, then when the light is dimmed, the long time constant causes it to flash on and off when it is dimmed. So if the

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2016-09-03 The Light Bulb Conspiracy – Not Really

There may be a Light Bulb Conspiracy, but it’s not what you think! First, let’s discuss the Light Bulb Conspiracy claim. They said that years ago, incandescent light bulbs lasted for 2500 hours, but now they last for only 1000 hours. They claim that this is a conspiracy to sell more products “by planned obsolescence.”

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2016-07-26 Surge Protectors

I have read about, discussed and experienced how surge protectors work and don’t work, and have written about it before, but Ill try again to explain. Ripoff The most egregious thing surge protectors do is take your money. One of the highest, if not the highest profit margin devices in your home is a surge

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