Archive for the ‘Lighting’ Category:

2019-09-07 2 LED Lights On One Supply

I got some 10W warm white LEDs, and I have some cool white LED strips and they’re both running in parallel off the same 12V supply. But they’re not the same voltage so I had to do some experimenting. The 10W LED is actually a group of 3 by 3 in series – parallel on

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2019-07-08 BigClive Fixes LED Floodlight With Solder

from YouTube video bigclivedotcom about fixing a LED floodlight. Half of the 100 LEDs went dark; he resoldered the LEDs and they all started working. The non-conducting half was not using its half of the 25 mA, so the conducting half was probably running at nearly twice its normal current, or about 25 mA. Hopefully

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2019-05-23 Color Perception And LED Lights

from FB group Building Transistor Radios May 25 Thomas Kirby Most LED lights now made have a CR (color rendering rating) of greater than 90. This is better than older LED lights and CFL lights, which were not good. If you have trouble seeing with your LED bulbs, check the label on the bulb and

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2019-01-17 Power Outlets Made From Electric Outlets

From FB comment to Bill Sherman’s post Bill Sherman The cable jacket may be too big diameter to fit into the clamp. But you might consider the special 20 amp plug, the one they put on the power strips that are used in the server racks. I forget what they’re called, but we specified those

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2019-01-10 The Ninth Anniversary Of The Philips LED Candelabra Lamp

On Jan 11, 2010 I connected a Philips candelabra lamp to the AC line and turned it on, and for the last nine years it has been running continually, except for a few days time when the power was out, which might add up to a few days, probably less than a week. I did

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2018-10-16 Major Power Outages In Neighborhood

from FB group Orange Talk Oct 16 Melissa McQuary Moser I grew up in a neighborhood that used ‘antiquated equipment’ and we didn’t have these long term outages. I’ve lived in Orange for decades close to Edison’s main station on Tustin and Taft, and our neighborhood had major outages lasting for hours. We remember 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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2016-02-16 Daylight LED Light Prices

I had to go to the big box home improvement store yesterday, and although I didn’t find the screws I was looking for, I did find that they had LED lights on pallets. I saw both warm white and daylight LED lights of the ‘stick’ kind, I believe one maker calls them bright sticks.  I

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