| [GMCnet] Restoration. Sizing for LED lighting. [message #295513] |
Sun, 14 February 2016 01:21  |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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Came up with a plan. Installing 8, 4 inch LED can lights. 400 lumina's each. All mounted in the ceiling with 4 equally space in a row on each side. Having two wall switches controling 4 lights at the front. And 4 at the rear. Both sets will also be controlled by a remote control for on, off, and dimmable. How many 12 volt amp's does it take to opperate 3200 lumina's? Bob Dunahugh.
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295514 is a reply to message #295513] |
Sun, 14 February 2016 02:07  |
Olly Schmidt
Messages: 1265
Registered: February 2014
Location: Germany and Scottsville, ...
Karma: 8
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Bob,
> How many 12 volt amp's does it take to opperate 3200 lumina's?
No easy answer, as it depends on the LEDs. Give more details about the
lights, and you shall be helped. I have switched most of my lighting
over to 5m long stripes recessed into the ceiling in my home, so do have
quite a bit of btdt.
--
Best regards
Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA
'76a Eleganza II, VA
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Best regards
Olly Schmidt
PGP Key ID: 0x18a9 3a1f 4196 bf22
'76a Eleganza II, VA
'73 Sequoia, SH, Germany
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295521 is a reply to message #295513] |
Sun, 14 February 2016 12:54 |
BobDunahugh
Messages: 2465
Registered: October 2010
Location: Cedar Rapids, IA
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Peer. I keep hearing that LED lighting design is more involved. In my case. I'm not just sticking in LED bulbs. This is from pure scratch. And I need to run the smallest wire size I can. As I'm running out of room in my walls for wire. At this point I have 9, 110 volt circuits. And 10, 12 volt circuits. Plus extra wire, and conduits for that just in case. So I'm going to have 4, 12v, 8.5 watts each LEDs that will run off each of the 2 wall switches. Then 4 floor LEDs ( like a 1156 backup light bulb equivalent ) on the adjoining switch. Next adjoining switch will operate the outdoor motion/dusk to dawn LED light. I'll have 4 wall switches that I'd like to run on one 12 volt fuse. I'm also thinking that I shouldn't have all my lights on one circuit for safety. Probably best to have 4 can LED's, and floor lights on one fuse. 4 can LED's, and outdoor LED on another. So do I use 14, or 16 gauge wire if I have 2 circuits? And what fuse? Bob Dunahugh
From: yenko108@hotmail.com
To: gmclist@list.gmcnet.org
Subject: Restoration. Sizing for LED lighting.
Date: Sun, 14 Feb 2016 01:21:55 -0600
Came up with a plan. Installing 8, 4 inch LED can lights. 400 lumina's each. All mounted in the ceiling with 4 equally space in a row on each side. Having two wall switches controling 4 lights at the front. And 4 at the rear. Both sets will also be controlled by a remote control for on, off, and dimmable. How many 12 volt amp's does it take to opperate 3200 lumina's? Bob Dunahugh.
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295526 is a reply to message #295521] |
Sun, 14 February 2016 14:14 |
Olly Schmidt
Messages: 1265
Registered: February 2014
Location: Germany and Scottsville, ...
Karma: 8
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Bob,
I sent a larger PDF containing information about wattage and lumen for
various LEDs via PM. Let me know if it helps. Don't want to clutter this
list with old chinese pricelists
--
Best regards
Peer Oliver Schmidt
PGP Key ID: 0x83E1C2EA
'76a Eleganza II, VA
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Best regards
Olly Schmidt
PGP Key ID: 0x18a9 3a1f 4196 bf22
'76a Eleganza II, VA
'73 Sequoia, SH, Germany
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295545 is a reply to message #295513] |
Mon, 15 February 2016 08:04 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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The gimme is 8.5 Watts each. 4 x 8.5 is 34 Watts. 34 Watts on a 12 v line works out to just under 3 Amps. Use three amps, size the wire for 4 amps, and go. i.e. 1 amp per lamp and you'll have a bit of a margin.
=-= johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295556 is a reply to message #295545] |
Mon, 15 February 2016 11:32 |
A Hamilto
Messages: 4508
Registered: April 2011
Karma: 39
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Johnny Bridges wrote on Mon, 15 February 2016 08:04The gimme is 8.5 Watts each. 4 x 8.5 is 34 Watts. 34 Watts on a 12 v line works out to just under 3 Amps. Use three amps, size the wire for 4 amps, and go. i.e. 1 amp per lamp and you'll have a bit of a margin.
=-= johnny Looking at a wire size/loss chart, 24 gauge wire will carry 3.5A, but has a loss of 25.67 ohms per 1,000 feet. If you have to run two wires because you don't have any frame members to ground to, you could end up with long runs. Every ten feet will be 0.2567 ohms, and 3 amps will drop 3/4 of a volt over that 10 feet. Or 1.5V in 20 feet. At some point, there won't be enough voltage to activate the magic in the LEDs.
You're going to want to use something bigger than 24 gauge.
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295561 is a reply to message #295556] |
Mon, 15 February 2016 13:44 |
Hal StClair
Messages: 971
Registered: March 2013
Location: Rio Rancho NM
Karma: -12
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I personally wouldn't use anything smaller than 18 gauge and probably 16 if for no other reason than physical strength. You never know what the future holds and any additions you might make later. The size difference is so little using a larger gauge should be a non issue.
Hal
"I enjoy talking to you. Your mind appeals to me. It resembles my own mind, except you happen to be insane."
1977 Royale 101348,
1977 Royale 101586, Diesel powered,
1974 Eagle Bus 45',w/slideout,
Rio Rancho, NM
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295587 is a reply to message #295513] |
Tue, 16 February 2016 07:46 |
jhbridges
Messages: 8412
Registered: May 2011
Location: Braselton ga
Karma: -74
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The wire inside the power cord on the LEDs I got looks like about 22 gauge. I cut the plugs off and stripped the outer because I wanted soldered/heatshrunk connections. 18 or 20 gauge wire would easily be sufficient for four of them with minimal loss. If you're going to pull the small stuff though, be sure it has a decent insulation. The heathen chinee stuff has insulation one step above candle wax and peels off easily.
--johnny
Foolish Carriage, 76 26' Eleganza(?) with beaucoup mods and add - ons.
Braselton, Ga.
I forgive them all, save those who hurt the dogs. They must answer to me in hell
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| Re: [GMCnet] Restoration. Sizing for LED lighting. [message #295607 is a reply to message #295513] |
Tue, 16 February 2016 11:32 |
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RF_Burns
Messages: 2277
Registered: June 2008
Location: S. Ontario, Canada
Karma: 3
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LED's are current devices, not voltage. SO IF the LED fixture has a LED constant current driver circuit in it, the driver will maintain a constant LED current with varying voltages, so therefore the LED remains the same brightness over the rated voltages. This is why you see some lights for trucks and heavy equipment rated at 12 to 24 volts.
HOWEVER, if the LED fixture is using a simple resistor to limit the current flow (read cheaper fixtures), then the current through the LED will vary with supply voltage and the LED brightness will vary.
Bruce Hislop
ON Canada
77PB, 455 Dick P. rebuilt, DynamicEFI EBL EFI & ESC.
1 ton front end
http://www.gmcmhphotos.com/photos/showphoto.php?photo=29001
My Staff says I never listen to them, or something like that
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