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Old 03-28-2012, 09:36 PM   #1
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LED bulbs


Am planning on replacing the three light fixtures in the kitchen ceiling (each with a rating of 60w) with an array of recessed lights. Best case I would like to have 7 or 8 fixtures. Can I use LED light bulbs to get under the total wattage of the original three fixtures so that I don't have to worry about overdriving the circuit? Is there another alternative short of adding another circuit?

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Old 03-28-2012, 09:45 PM   #2
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Am planning on replacing the three light fixtures in the kitchen ceiling (each with a rating of 60w) with an array of recessed lights. Best case I would like to have 7 or 8 fixtures. Can I use LED light bulbs to get under the total wattage of the original three fixtures so that I don't have to worry about overdriving the circuit? Is there another alternative short of adding another circuit?
well what makes you think your going to overload the circuit?

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Old 03-28-2012, 10:13 PM   #3
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Am planning on replacing the three light fixtures in the kitchen ceiling (each with a rating of 60w) with an array of recessed lights. Best case I would like to have 7 or 8 fixtures. Can I use LED light bulbs to get under the total wattage of the original three fixtures so that I don't have to worry about overdriving the circuit? Is there another alternative short of adding another circuit?
Even with 75w halogens in each of your 8 cans you'd only be drawing 5A. What else is on this circuit/why are you worried it might be overloaded by the addition of the cans?
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Old 03-28-2012, 10:54 PM   #4
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Not to hijack the thread...but has anyone actually done a cost analysis to determine if the energy savings come close to the initial cost of the lamps and/or fixtures? I understand the concern for conservation, but doesn't conservation start at home....as in saving your money?
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Old 03-28-2012, 10:57 PM   #5
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I need to check on what else is on the circuit, but if it is like anything else in this house, it is probably close to its maximum. The kitchen is located centrally in the house, so I suspect that the circuit might also power stuff in the den or laundry or garage.
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Old 03-29-2012, 04:25 AM   #6
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Try using these:

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Old 03-29-2012, 10:48 AM   #7
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As a general rule....

A 'typical' LED bulb is about 10% more effecient than a typical CFL of the same lum's.

T T5 lamp is more effecient than an LED bulb....T8's are about par with LED's.

When you look at 'total cost', LED's are not the way to go....for now.

Notice how the stated life of LED's is now down to about 25K hours? If you figure that the average CFL costs $2-4....and LED around $30....even at $4/ea for the CFL....you would replace the CFL 3 times for the one LED...but that works out to about $12....and even if the LED is 10% more effecient....it falls way short of making up the $18 difference.

One advantage of LED's...instant on and they work in real cold climates.

I don't think LED's are the holly grail of lighting....I think the perfect light buld is still waiting to be found.

If your going to repace a bunch of fixtures...look into GU24 sockets. They meet Title 24 requirments and you can use both LED and CFL bulbs in them. It's just not as easy to find bulbs.
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Old 03-29-2012, 03:28 PM   #8
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Originally Posted by Missouri Bound View Post
Not to hijack the thread...but has anyone actually done a cost analysis to determine if the energy savings come close to the initial cost of the lamps and/or fixtures? I understand the concern for conservation, but doesn't conservation start at home....as in saving your money?
http://www.homedepot.com/webapp/wcs/...3463%2d%5f%2dN

Brightness: 575 Lumens
Estimated Yearly Energy Cost: $1.14 (Based on 3 hrs/day, $0.11/kWh. Costs depend on rates and use.)
Life: 32.0 years (Based on 3 hrs/day)
Light Appearance: 2700K (soft white)
Energy Used: 9.5 watts (equivalent to a 65 watt standard incandescent light bulb)

These are $40 each. That's replacement of 0.03125 bulbs per year, $1.25 annual bulb cost.

http://www.homedepot.com/h_d1/N-5yc1...&storeId=10051

Brightness: 635 lumens
Estimated Yearly Energy Cost: $7.83 (Based on 3 hrs/day, 11c/kwh. Costs depend on rates and use.)
Life: 1.8 years (Based on 3 hrs/day)
Light Appearance: 2700K (Soft White)
Energy used: 65 watts
Lumens per watt: 9.7

These are $3.33 each. If they last 1.8 years, you will need to replace 0.55 bulbs per year = $1.85 annual bulb cost.

7.83-1.14= $6.69 saved per year in electricity.
1.85-1.25= $0.60 saved in bulbs per year.

Total annual savings = $7.29.

$40 / $7.29 = 5.5 year payback (assuming I did this right).

32 - 6 = 26 years of LED life after payback, 26 x $7.29 = $189.54 savings over the life of the bulb.

But the upfront costs are substantial if you replace a lot of them, and you'd have to factor in interest rates, inflation, etc. that affect the cost of paying now instead of spreading out the costs of the regular bulbs over the years.

Last edited by M3 Pete; 03-29-2012 at 03:36 PM.
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Old 03-29-2012, 03:45 PM   #9
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Originally Posted by M3 Pete View Post
http://www.homedepot.com/webapp/wcs/...3463%2d%5f%2dN

Brightness: 575 Lumens
Estimated Yearly Energy Cost: $1.14 (Based on 3 hrs/day, $0.11/kWh. Costs depend on rates and use.)
Life: 32.0 years (Based on 3 hrs/day)
Light Appearance: 2700K (soft white)
Energy Used: 9.5 watts (equivalent to a 65 watt standard incandescent light bulb)

These are $40 each. That's replacement of 0.03125 bulbs per year, $1.25 annual bulb cost.

http://www.homedepot.com/h_d1/N-5yc1...&storeId=10051

Brightness: 635 lumens
Estimated Yearly Energy Cost: $7.83 (Based on 3 hrs/day, 11c/kwh. Costs depend on rates and use.)
Life: 1.8 years (Based on 3 hrs/day)
Light Appearance: 2700K (Soft White)
Energy used: 65 watts
Lumens per watt: 9.7

These are $3.33 each. If they last 1.8 years, you will need to replace 0.55 bulbs per year = $1.85 annual bulb cost.

7.83-1.14= $6.69 saved per year in electricity.
1.85-1.25= $0.60 saved in bulbs per year.

Total annual savings = $7.29.

$40 / $7.29 = 5.5 year payback (assuming I did this right).

32 - 6 = 26 years of LED life after payback, 26 x $7.29 = $189.54 savings over the life of the bulb.

But the upfront costs are substantial if you replace a lot of them, and you'd have to factor in interest rates, inflation, etc. that affect the cost of paying now instead of spreading out the costs of the regular bulbs over the years.
I love posts with accurate data....good job M3...

And if you wanted to compare to a CFL PAR lamp....

http://www.homedepot.com/Electrical-...&storeId=10051

Brightness: 640 lumens
Estimated Yearly Energy Cost: $1.69 (Based on 3 hrs/day, 11/kWh. Costs depend on rates and use.)
Life: 7.3 years (Based on 3 hrs/day)
Light Appearance: 2700K (Soft White)
Energy Used: 14-watts (equivalent to a 65-watt standard incandescent light bulb
Lumens per Watt: 45

6/pak....$20...or about $3/bulb....it would take about 3 bulbs to las the life of an LED.....

Much lower cost up front....and no telling where the lighting technology will be 10 years from now....
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Old 03-29-2012, 03:59 PM   #10
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CFLs have some disadvantages too, slow warmup, expensive dimmers and dimmable bulbs, etc. The dimmable bulbs are about $7.50 each
http://www.homedepot.com/h_d1/N-5yc1...&storeId=10051

No clear answer, it's a tradeoff.

I bought some LED downlights for a powder room I'm remodeling. THey were on sale for $37, and I was looking for a modern update to 6" cans, and these were the perfect solution. They do take about a half-second to come on, but then it's full brightness. Can't find them for less than $60, should have bought more, I guess.

http://www.lightinguniverse.com/prod...=1525&cse=1525

Last edited by M3 Pete; 03-29-2012 at 04:03 PM.
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Old 03-29-2012, 09:52 PM   #11
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Quote:
Originally Posted by coyote97 View Post
Am planning on replacing the three light fixtures in the kitchen ceiling (each with a rating of 60w) with an array of recessed lights. Best case I would like to have 7 or 8 fixtures. Can I use LED light bulbs to get under the total wattage of the original three fixtures so that I don't have to worry about overdriving the circuit? Is there another alternative short of adding another circuit?
Well if you are comfortable you can ask a home depot representative or something... He might be able to give you some better insight.
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Old 03-30-2012, 03:39 PM   #12
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I took a look at the GU24 fixtures online. They seem to provide what I need (reduced power consumption) for a much less cost. I will let you know how it goes when I get closer to installation.
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Old 03-30-2012, 04:14 PM   #13
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I took a look at the GU24 fixtures online. They seem to provide what I need (reduced power consumption) for a much less cost. I will let you know how it goes when I get closer to installation.
Just so you understand....GU24 is just the socket....vs the Edison socket.

When your required to do high effeciency lighting....if you have GU24 sockets in your lights...then it's considered high effeciency....in other words, your not going to find an incandescent bulb with a GU24 base....only LED and CFL lights.

I'm going to be doing GU24's in most of my can lights. If the price of LED's comes down...great....if not, I'll be just fine with CFL's.....or until something better comes along.

I think you are wise to go with GU24.....

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