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Both of my back yard flood light bulbs failed #4582139
11/22/17 06:00 PM
11/22/17 06:00 PM
Joined: Sep 2015
Posts: 4,115
Connecticut
69GTX Offline OP
69GTX  Offline OP

Joined: Sep 2015
Posts: 4,115
Connecticut
Looking for the most likely cause. My wife had this dual bulb, motion sensor unit installed 15 yrs ago. Since then, she's replaced bulbs once. So this time, changing bulbs would have been the likely fix. Today I installed new LED style bulbs (120 v). When the lamps came on, they were flashing like a strobe. Now that was unexpected. 10 seconds or so later they went steady. OK, maybe that was some sort of trial, burn in? After another 5-10 seconds they just stopped working altogether. They wouldn't come on again as the switch was cycled. No idea if the old lights failed together or one at a time a few weeks/months ago.

Did the fixture itself actually fail earlier and now it took out these new lamps? LED's not compatible? I figured someone here has experienced this or something similar. Not too keen about wasting another possible $11 in bulbs if the fixture is likely the culprit. Why would they even flash? At this point, I'd be thinking the fixture has a fault.

Thanks in advance for any tips.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582151
11/22/17 06:14 PM
11/22/17 06:14 PM
Joined: Jun 2003
Posts: 34,096
ME
eljefino Offline
eljefino  Offline

Joined: Jun 2003
Posts: 34,096
ME
LEDs aren't compatible. You need at least one incandescent in there.

The light's brains are wired in series with the filament and need "enough" current going through to power it up.

LEDs have their own shenanigans and don't let enough current through. Try throwing a 25 watter in one socket, or, if it matters to you, an equal/ appropriate sized incandescent flood.

Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582179
11/22/17 06:48 PM
11/22/17 06:48 PM
Joined: Mar 2004
Posts: 21,880
Upstate NY
Donald Online content
Donald  Online Content

Joined: Mar 2004
Posts: 21,880
Upstate NY
You need LEDs that can be dimmed. Many dimmers or motion detectors use a thyristor or something similar to control the bulb and the output is not a nice clean 60 Hz sine wave. Its a chop wave or square wave.

LED bulbs that are not dimmable need a nice clean 60 hz.


2015 Subaru Forester 2.5 engine/CVT
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Re: Both of my back yard flood light bulbs failed [Re: Donald] #4582184
11/22/17 06:54 PM
11/22/17 06:54 PM
Joined: Sep 2015
Posts: 4,115
Connecticut
69GTX Offline OP
69GTX  Offline OP

Joined: Sep 2015
Posts: 4,115
Connecticut
Originally Posted By: Donald
You need LEDs that can be dimmed. Many dimmers or motion detectors use a thyristor or something similar to control the bulb and the output is not a nice clean 60 Hz sine wave. Its a chop wave or square wave.

LED bulbs that are not dimmable need a nice clean 60 hz.


Now that you mention it, these lights are supposed to "dim" as they go off. And when coming on, the intensity ramps up. So I goofed there selecting non-dimmable lamps. So my choices are dimmable regular bulbs or LEDs. Thanks.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582228
11/22/17 07:36 PM
11/22/17 07:36 PM
Joined: Feb 2010
Posts: 4,838
Central Texas
sleddriver Offline
sleddriver  Offline

Joined: Feb 2010
Posts: 4,838
Central Texas
LED bulbs draw much less current than halogen, incandescant based floods. That's why they cost less to run. Problem is many older fixtures (15yrs old) aren't designed for them. Like all my X10 stuff (30yrs old too).

So, what to do? Replace the fixture with a new one compatible with LED bulbs.

It flutters because some current flows (leaks), however just not enough for a "hard off" state to occur. Thus it oscillates back 'n forth.


1998 Volvo V70 T5 228,880 mi. Original Owner.
M1 10W-30 HM
"It's never a mistake to buy tools, defined broadly. They're not a cost, they're an investment." - J.B. Peterson
Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582251
11/22/17 08:03 PM
11/22/17 08:03 PM
Joined: Feb 2013
Posts: 11,360
Phoenix, AZ
Nick1994 Offline
Nick1994  Offline

Joined: Feb 2013
Posts: 11,360
Phoenix, AZ
I've found some LEDs just aren't compatible in certain sockets.

Try some CFLs


2015 Hyundai Sonata 2.4L 92k STP Synthetic HM 10w30 & Wix
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Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582295
11/22/17 08:37 PM
11/22/17 08:37 PM
Joined: Dec 2016
Posts: 8,046
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,046
Waco, TX
I got rid of screw in flood lights and now use something a lot like these, but larger!

https://www.amazon.com/MEIKEE-1500lumen-Equivalent-Waterproof-Floodlight/dp/B01GY6P26K/ref=sr_1_8



"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582346
11/22/17 09:13 PM
11/22/17 09:13 PM
Joined: Mar 2014
Posts: 3,829
NJ
Leo99 Offline
Leo99  Offline

Joined: Mar 2014
Posts: 3,829
NJ
I've found the motion detector fixtures to be a bit finicky. Mine don't always come on or turn off after 5 minutes. Just replaced a bulb in mine today after I noticed the old bulb's glass lens cracked and fell out. Maybe the fixture Linctex posted above is more robust. Those two bulb $15 fixtures are not very robust.


Without data you're just another person with an opinion. W. E. Deming

2003 Corolla 250,000 miles (RIP)
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Re: Both of my back yard flood light bulbs failed [Re: Leo99] #4582399
11/22/17 09:52 PM
11/22/17 09:52 PM
Joined: Sep 2015
Posts: 4,115
Connecticut
69GTX Offline OP
69GTX  Offline OP

Joined: Sep 2015
Posts: 4,115
Connecticut
Sounds like the best solution is to buy some old style flood lamps. They aren't on all that much any ways. Not worried about the juice. Thought LEDs would be cool as they are extra bright. The town public works just replaced all the street lamps in our area with LEDs. Holy smokes. The streets are lit up like it's a full moon every night. We used to need to have our front security light on. The street lamp now lights up everything better than our old light.


----------------

2001 Lincoln Cont 4.6L DOHC/ 39K mi / QS HM 5w30 / FUG XG2
1999 Camaro SS M6 /19K /Mobil 1 0w40 /Fram UG /GM MTL-ATF
1969 Ply GTX/RRs
Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582429
11/22/17 10:15 PM
11/22/17 10:15 PM
Joined: Dec 2002
Posts: 42,639
New Jersey
JHZR2 Offline
Global Moderator
JHZR2  Offline
Global Moderator

Joined: Dec 2002
Posts: 42,639
New Jersey
Assuming they are really just intermittent on lights, yes, use incandescent bulbs as it's just not that much electricity. What has been said above is true - currrent needs to flow through.

Otherwise buy a modern fixture. I have some exterior lights that aren't on sensors, they're meant to be in for longer periods when used. CFL and LED work great if just switched on and left.

Re: Both of my back yard flood light bulbs failed [Re: 69GTX] #4582537
11/23/17 01:13 AM
11/23/17 01:13 AM
Joined: Dec 2016
Posts: 8,046
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,046
Waco, TX
Originally Posted By: 69GTX
The town public works just replaced all the street lamps in our area with LEDs. Holy smokes. The streets are lit up like it's a full moon every night.


The ones I am using are "500 watt equivalent" - about 4X larger than the ones I posted.

yes, they are VERY much worth it!


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
Re: Both of my back yard flood light bulbs failed [Re: Linctex] #4582554
11/23/17 02:11 AM
11/23/17 02:11 AM
Joined: Jun 2003
Posts: 1,981
Sequim, WA
edhackett Online content
edhackett  Online Content

Joined: Jun 2003
Posts: 1,981
Sequim, WA
Originally Posted By: Linctex
Originally Posted By: 69GTX
The town public works just replaced all the street lamps in our area with LEDs. Holy smokes. The streets are lit up like it's a full moon every night.


The ones I am using are "500 watt equivalent" - about 4X larger than the ones I posted.

yes, they are VERY much worth it!


https://gizmodo.com/the-switch-to-outdoor-led-lighting-has-completely-backf-1820652615

The full article referenced:
http://advances.sciencemag.org/content/3/11/e1701528.full

Ed


Never attribute to engineers that into which politicians, lawyers, accountants, and marketeers have poked their fingers.
Re: Both of my back yard flood light bulbs failed [Re: edhackett] #4639841
01/19/18 12:29 PM
01/19/18 12:29 PM
Joined: Dec 2016
Posts: 8,046
Waco, TX
Linctex Offline
Linctex  Offline

Joined: Dec 2016
Posts: 8,046
Waco, TX


Are you trying to say I contribute to the light pollution epidemic?
Mine are focused down since they are on 30' towers. No light goes "up".


"The evidence demands a verdict".
(Re:VOA)"it's nearly impossible to actually know the particular additives that are in there at what concentrations."
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