Re: Long life lights

Aug 25, 2008 2 Replies


>


>>I've got a problem. I happen to carry the distinction of being the one
>>responsible for changing lights. Much as that's a problem in itself, the
>>biggest problem is.....the front porch light (surprisingly, it's not a
>>stairway light, eh?), which happens to be a hanging, upside-down, enclosed
>>fixture. And they put two screws in the thing, so it's almost impossible
>>for a single person to replace the bulb thus inserted. Really quite
>>remarkable how no one thought of this.
>>
>>Besides modifying it, which I may consider because it's just that bad, in
>>the mean time I need something that'll last. We've already tried the "ten
>>gajillion hour" CFLs, which died in all of, you know it, three months. I'm
>>guessing something high voltage (130V+?) and incandescent. Any
>>recommendations?
>>
>>Tim
>
>A 230 volt incandescent, or a 120 volt one with a diode in series.

Of course, a 120V incandescent with a diode in series is equivalent to a 170VAC incandescent, so you'll get shorter life, but a less "red" light, and better efficiency at creating visible light.


You used to be able to buy button diodes that screwed into the bottom of a light socket.


I find that, in general, CFs last a long time if run continuously, but
>die when cycled. So a 5 or 7-watt CF might be left on 24/7 and last
>longer and use less net power than an incendescent run at lower
>voltage.
>
>There are some screw-in LEDs available now. I asume they're reliable.
>
>John

Best regards, Spehro Pefhany


"it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com

A shorter life?

I found a sidac in one of these buttons. Claimed to reduce inrush. Can't see how, as inrush is a simple function of cold element impedance. Can't imagine the semiconductor - basically a self-firing triac, would last long in that kind of thermal environment - one that is not improved by extra crap shoved into the lamp base.

RL

Shorter than a 230VAC bulb on 120VAC, of course.

See, for example, US 3617766, US 4229680

Sounds like it would cause nasty RFI continuously. Best regards, Spehro Pefhany

"it\'s the network..." "The Journey is the reward" speff@interlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com

Join the Discussion

Have something to add? Share your thoughts — no account required.

Didn't find your answer?

Ask the community — no account required