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At least where I am now near St. Louis, voltage spikes kill incandescent, LED, and CFL bulbs about equally with a half life of about half a year so less expensive incandescent bulbs (or

Using a diode in series works well for porch lights which do not need to be as bright anyway. The effect on operating life is much greater than the effect on efficiency and

The recent series Chance with Hugh Laurie had a Tektronix 465M or 465 variant in the back room of the antique furniture shop for some reason. They were using stories from actual science fiction

With incandescent bulbs you could put a diode in series and it would last almost forever. Efficiency was probably really crappy, but it still gave reasonable (if a bit flickery) light output. I've

And we have modern replacements for sampler diodes in the form of low voltage low capacitance microwave mixing diodes. Although Avago (old HP and now Broadcom) has discontinued theirs, they are still

The failure mechanism in an incandescent light is mainly related to filament thinning as the tungsten evaporates slowly and is deposited on the inside of the glass bulb. Eventually, the inrush

On 15/07/18 14:13, Colin Herbert via Groups.Io wrote: > Hi, > I thought that I recalled some discussion on dismantling these A and B time-base knobs safely, but I can't find it now. My problem is that

About 40 years ago an engineer at Stanford University demonstrated the importance of running florescent light fixtures in a three-phase pattern where the three tubes in a fixture were connected to

Hi, I thought that I recalled some discussion on dismantling these A and B time-base knobs safely, but I can't find it now. My problem is that I have a 466 which looks to be fine so far, except for

On my solder station bench I had a drafting lamp with two 20 w tubes that were a real pita. I really liked the fixture so I replaced the tubes with dual row led strips powered by a adjustable 12v

david.partridge@...> wrote: It still is, though in digital HD these days. Back to the topic, LED bulbs vary wildly in their behaviour and quality. Cheap ones can and do flicker because

UK TV: 50Hz half frame, interlaced full frame was 25Hz. Dave

I'm not sensitive to flicker, but the point sources from undiffused LED arrays like our new street lights or security lights really hurts my eyes at night. -Dave To: [email protected] Sent:

I made a fixture years ago for working under the car at night.? Three 150W bulbs in ceramic bases.? Not only could I see everything, but it warmed up the carport in the winter!? ?? CFLs are

Correct. Craig

According to an EU study, which assumed only 20% recycling, CFLs still release less mercury than incandescent bulbs, if you account for the mercury emissions by coal power plants which made up about

This might have been off topic, but nonetheless interesting reading. I have been switching to LED lighting for about 4 years. My new lab and shops are 90% LED. I am impressed with how much light the

Thanks, EJP. That does appear to be the cas e.? One email says jfordATieeeDOTorg, and one says jamesDOTfordATcoxDOTnet.? I unsubscribed form the latter and checked Special Notifications Only so I

On Sat, 14 Jul 2018 19:31:28 -0700, you wrote: >Many years ago when I was a 'lecky, I worked on a very expensive lathe light fitting that was using fluorescent tubes. > >I was amazed that a lathe

LEDs don't flicker when fed with clean, filtered DC. The light fixture in my bedroom has three LED bulbs under the ceiling fan and they don't flicker under normal usage. Just before they fail, I have