Archive for the ‘Lighting’ Category:

2022-04-20 Philips Ultra Efficient LED Light

Big Clive tears down and reverse engineers a Philips ultra efficient light bulb. It’s 60 watts equivalent but draws only 4 watts. It has a color rendering index of only 80, and costs about ten Pounds UK or about $13 US. This uses 8 filament strings of LEDs and the filament string drops about 200

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2022-04-01 Residential Energy Survey

There are still a lot of CFL and incandescent light bulbs being used. https://cleantechnica.com/2022/03/31/47-of-u-s-households-use-led-bulbs-for-all-or-most-indoor-lighting/

2022-03-20 LED Lights May Not Last As Long As Incandescent Lights

The lifetime of incandescent and LED lights is extremely dependent on the temperature at which they run – for incandescents, GE says it’s the inverse of the 7th power of the voltage – the voltage increases and the lifetime decreases. In the case of LEDs the problem is most designs sacrifice thermal management to get

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2022-01-22 LED Xmas Light String Repair

A string of LED xmas lights had been fritzing on and off, then it finally failed. I had to pull out 4 lights before I found two that were dead. I had to file off the ridge around the base to get them to fit properly into the base. So it’s back working again. It

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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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