Looking for Long Life Pilot Lamp

[jeff_wisnia]

That "thwock" you may have heard was me giving myself a "dope slap" to my forehead for missing the fact that the OP doesen't have a phone there.

Jeff

[stan]

If not LED use two 115 volt bulbs in series. Or use a 230 volt bulb on

115 volts. Also myself and neighbour use a radio frequency baby monitor to 'listen' to the other's house when either of us are away. If/when our intrusion alarm or smoke alarm were to go off the other family will hear it immediately and investigate, We exchange keys and keep an eye on each other's property, have done for years. Couldn't ask for better neighbours although we rarely if ever socialize or attend same church.

[larry]

An SKU or manufacturer part number please?

Our local HD only had a 2 fer $4.95 three led nightlight bulb replacement. The help can only find stuff if we can give them a number, the manager said it might be in the new lighting department re-do in scheduled for June.

thanks

-- larry/dallas

[JIMMIE]

There are LED lamps that just screw into a regular 120 vac Edison Socket. I saw some the other day for about $8USD. Just screw into your porch light socket. They use about 1 watt and there light output is the equivalent to a 20 watt incandescent bulb.

Jimmie

[Don Klipstein]

A 25 watt incandescent produces 180-230 lumens, and a 15 watt one produces usually 100-120 lumens. I have yet to see any LED lamps on the market achieving this sort of light output with one watt, though I have seen a lot of claims that I find hard to believe.

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Many white LEDs fade at a significant rate with use. Some better high power ones will fade by only 30% in 50,000 hours if they are kept sufficiently cool. Many low power white LEDs will fade 30% or more in

6,000-10,000 hours. I have known one white LED nightlight to fade by about half in about 4,000-4,500 operating hours.

Most red, orange, amberish-yellow, green, blue-green and blue LEDs have good prospect of lasting the 100,000 hours that is widely claimed for life expectancy of LEDs, as long as they are not overdriven and not allowed to overheat.

UV, violet, purple, pink, pastel, and "phosphor yellow" (generally less orangish than "school bus yellow", sometimes a hair greenish) tend to have issues affecting life expectancy - expect 50,000 hours or less from most of these. Many UV ones with epoxy or plastic bodies have UV output fading significantly in mere hundreds of hours at "full power", and many similar violet ones fade significantly in several hundred to a couple thousand hours. Many UV and violet ones with all-inorganic construction are only rated to last 50,000 hours.

Pink, lavendar/purple and other colors depending on phosphors will likely last 50,000 hours optimistically, maybe merely 6,000-10,000 hours.

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The 3-LED "C7" Feit Electric unit appears to me likely to last the claimed

50,000 hours or at least get a majority of the way there despite having white low power LEDs. The LEDs in that unit are operated at highly reduced current, maybe about 3.3-3.4 milliamps, about 16.5-17% of the usual 20 milliamp "characterizing current" of most low power LEDs where life expectancy is maybe 6,000-10,000 hours when doing well. 3.3-3.4 milliamps is about 11% of the rated maximum current of most of such LEDs.

The LED nightlight that I found to fade by about half in about 4,000 hours has the LEDs passing current close to 30 mA.

- Don Klipstein ( [e-mail])

[Jon Danniken]

Edison was a two-bit hack; his fame came from marketing other people's inventions and taking credit for them as his own.

Jon

[Wayne Boatwright]

On Mon 27 Apr 2009 07:58:15p, frank1492 told us...

A virtually foolproof solution would be to use a 2-bulb fixture and wire the two sockets in series. Use 2 60-watt bulbs. They will last almost indefinitely and provide sufficient light to be visible to the neighbor.