Freezing temperatures affecting floodlight Electronics

11 posts / 0 new
Last post
DOC1500
DOC1500's picture
Offline
Last seen: 1 year 2 months ago
Joined: 01/19/2019 - 10:18
Posts: 98
Location: Clarks Summit, Pennsylvania
Freezing temperatures affecting floodlight Electronics

Hey guys I don’t have the specs of the flood lights that I have out behind my house, this is a generalized question.
My multi LED flood lights behind my house appear to be a little more dim than they are in the summer.
Do the freezing cold temperatures have that much of an effect on the electronic components that drive the LEDs that would cause the light to appear dimmer ??

A lie is a lie even if everybody believes it.. The truth is the truth even if nobody believes it.
John 3:16 --
2 Cor 5:17

BlueSwordM
BlueSwordM's picture
Offline
Last seen: 1 week 1 day ago
Joined: 11/29/2017 - 12:34
Posts: 5553
Location: Canada

Do they have battery packs?

My very own high current Beryllium Copper springs Gen 3:
http://budgetlightforum.com/node/67401
Liitokala Aliexpress Stores Battery Fraud: http://budgetlightforum.com/node/60547

DOC1500
DOC1500's picture
Offline
Last seen: 1 year 2 months ago
Joined: 01/19/2019 - 10:18
Posts: 98
Location: Clarks Summit, Pennsylvania
BlueSwordM wrote:
Do they have battery packs?

No. 110 volt

A lie is a lie even if everybody believes it.. The truth is the truth even if nobody believes it.
John 3:16 --
2 Cor 5:17

Scallywag
Scallywag's picture
Offline
Last seen: 14 hours 39 min ago
Joined: 01/11/2018 - 22:23
Posts: 1734
Location: Ohio, United States
DOC1500 wrote:
BlueSwordM wrote:
Do they have battery packs?

No. 110 volt


The LEDs don’t care. I can’t speak to the electronics in the driver circuit, though.

Old Lumens Contest 2020 - Hand-made light category

ZL SC62(w) | Jaxman E2L XP-G2 5A | Purple S2+ XPL-HI U6-3A | D4 w/ Luxeon V | RRT-01 | Purple FW3A, 4000K SST20 | Baton S1
Boruit D10 w/ Quadrupel Fet+1/Anduril | EagTac D25C Ti | DQG Slim AA Ti | Jaxman E3 | UF-T1 by CRX | Olight S15 Ti | Nitecore EX11.2
L6 XHP70.2 P2 4000K FET+7135 | Jaxman M8 | MF02 | Jaxman Z1 CULNM1.TG | Blue S2+ w/ ML Special | Thrunite T10Tv2
Supfire M6 3xXHP50.2, Sofirn C8F, Unfinished: Sofirn SP70, IYP07/Tool AAA hot-rods, Jetbeam E3S
Others: Nitecore EC23 | Nebo Twyst | Streamlight ProTac 1AA | TerraLux LightStar 100

DOC1500
DOC1500's picture
Offline
Last seen: 1 year 2 months ago
Joined: 01/19/2019 - 10:18
Posts: 98
Location: Clarks Summit, Pennsylvania

Scallywag wrote:
DOC1500 wrote:
BlueSwordM wrote:
Do they have battery packs?

I’ll see if I can dig up more information on the internals and specs of the lights.

No. 110 volt


The LEDs don’t care. I can’t speak to the electronics in the driver circuit, though.

A lie is a lie even if everybody believes it.. The truth is the truth even if nobody believes it.
John 3:16 --
2 Cor 5:17

DOC1500
DOC1500's picture
Offline
Last seen: 1 year 2 months ago
Joined: 01/19/2019 - 10:18
Posts: 98
Location: Clarks Summit, Pennsylvania

No battery pack connected directly to 110 volt

A lie is a lie even if everybody believes it.. The truth is the truth even if nobody believes it.
John 3:16 --
2 Cor 5:17

toddcshoe
toddcshoe's picture
Offline
Last seen: 3 hours 19 min ago
Joined: 01/24/2018 - 23:49
Posts: 2506
Location: Foley, MO

I think Scallywag was referring to the driver circuit for the LED’s. The may be affected by the frigid temps and take a while to warm up or just not work at peak efficiency in those temps. I have a LED bulb in the back porch light that takes 10 minutes to get to max brightness when it’s below freezing.

"Everywhere I go, there I am"

TexasToasted
TexasToasted's picture
Offline
Last seen: 2 weeks 2 days ago
Joined: 10/25/2012 - 08:48
Posts: 1214
Location: Texas Gulf Coast

Fluorescent flood lamps are dimmer in the cold. A lot dimmer.

Lightbringer
Lightbringer's picture
Offline
Last seen: 2 hours 51 min ago
Joined: 08/30/2016 - 14:12
Posts: 13724
Location: nyc

Check to make sure “110V” is actually 110V, and that nothing else is on that circuit (heaters, etc.) that’d pull the voltage low.

09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0

bobflux
Offline
Last seen: 2 weeks 1 day ago
Joined: 12/11/2018 - 14:15
Posts: 20
Location: France

> Do the freezing cold temperatures have that much of an effect on the electronic components that drive the LEDs

At cold temperatures:

- Electrolytic capacitors Equivalent Series Resistance (ESR) goes up (way up below freezing). As ESR increases, this is like having a resistor of higher value in series with your cap, so it will be much less effective. For example when the high voltage input cap (after the rectifiers) freezes it will no longer deliver smooth voltage so your light will flicker at twice mains frequency. If your lights do not flicker when warm, but flicker when cold, this is why.

- Ceramic capacitors with cheap dielectric (Z5U, Y5V) lose a lot of capacitance. If these are used instead of wide temperature range caps like X7R, depending on what they do in the circuit there may be consequences.

- Transistors generally don’t care, MOSFETs have lower ON-resistance when cold.

- The voltage reference in the driver which is used to set current will probably drift a little bit too

Most likely culprit is capacitors.

snakebite
snakebite's picture
Offline
Last seen: 10 hours 36 min ago
Joined: 11/20/2013 - 20:21
Posts: 1998
Location: dayton oh

the esr of lytics rising with cold is the biggest issue.
most led fixtures use the cheapest ones that just barely do the job.
leaving no margin.
otoh the leds are more efficient cold.
after it runs a bit and reaches equilibrium none of this matters.
it might be dimmer at startup but slowly brightens as it warms up which may not be noticed.