Jim Walls via EV wrote:
On 7/29/2018 11:56 PM, Roger Stockton via EV wrote:
My experience is that if you are in the habit of turning a light on
when you enter a room and off when you leave, that CFLs will die
*faster* than incandescents. If you leave a CFL on continuously, it
will last much longer than if it is switched on and off frequently.
I will agree with that one.
Same for me. They don't last if frequently switched on/off.
I replaced the incandescencs in my basement with CFLs. They died faster
than the incandescents, because they were typically only turned on
briefly. I went back to incandescents, but run them through a dimmer. I
turn them on by cranking the knob up slowly, to "soft start" the
incandescents. That was 10+ years ago, and not a single incandescent has
failed.
energy savings isn't important, because they aren't on enough to matter,
and I don't mind a little extra heat in the basement.
I don't yet know if LED bulbs will outlast CFLs or incandscents when
they are switched on and off frequently.
The LEDs themselves won't care. But the control electronics might.
Especially if they cheapen them into an early death.
LED lights basically have a stripped down el-cheapo switchmode power
supply. Such supplies typically have a rectifier off the AC line, and a
big filter capacitor. No "inrush" current limiter is provided (it would
add cost). The diodes get hit by the high peak turn-on current as they
try to charge that capacitor "instantly".
And the capacitors are usually electrolytics (the cheapest kind), with
voltage and temperature ratings that are barely adequate. Electrolytics
have a limited life anyway; 1000 hours is typical at full voltage and
temperature.
So the stage is set for early failures for LED lights in frequent on/off
use, too.
--
There is hardly anything in the world that someone cannot make a
little worse and sell a little cheaper. Those who consider price
alone are that person's lawful prey. -- John Ruskin
--
Lee Hart, 814 8th Ave N, Sartell MN 56377, www.sunrise-ev.com
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