Cat_Driver
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agreed led wins always
Anyone have a LED dusk to dawn pole light?
- Thread starter TNhobbyfarmer
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k0ua
Epic Contributor
It depends, but I would consider either using some of the LED strip type replacements for 4 foot fluorescent tubes or adding a bunch more fixtures to use screw in LED replacements for the BR30 65watt bulbs. A lot depends on your installation, and how it is laid out and how many fixtures you have now. I assume you are using mogul based 300 watt bulbs. How many? How big of an area? etc. I am not really a lighting engineer, but If I had a bunch of 300 watt bulbs burning for very long, I would be doing some quick calculations as to how long the payoff for rewiring and re fixturing would take to make a profit. Those dang 300 watt bulbs are costing you a fortune to run.
sixdogs
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Have eight 300W incandescents in a 42 x 60, or so, 14' high barn on two switches, one for each bank. That's how it was done 18 years ago. The 300W bulbs look like a normal light bulb with the larger base. I'm not planning to rewire and such but am open to learning about alternatives. The lights don't run very often since I'm not out there at night and when I am out, the big doors are open.
Pirate
Gold Member
I have sodium vapor lights mounted on each side of the house pointing out. I like to see the yard lit up at night and my cameras are mounted inside looking out so I can't use IR. 70W sodium bulbs are around 6000 lumens. From what I have been reading, many cities are now starting to replace their 5K color temp lights with something down in the 3K due to irritation from the brighter 5K. I have been looking for new lights to replace my sodium lights but have really only found one source for the warmer 3K color. Still thinking about it. 5 Watt LED Flood Light Fixture - 5,6 Lumens | LED Landscape Flood Lights | Super Bright LEDs
The other thing I can't figure out is lumens vs watts. Sodium vapor gives me 6000 lumens at 70W. These LED's give me 5600 lumnes at 54W. I'm not sure what I am saving here to keep the same about of lumens. Folks keep saying you don't need as many lumens as the light is output differently but to me a lumen is a lumen.
The other thing I can't figure out is lumens vs watts. Sodium vapor gives me 6000 lumens at 70W. These LED's give me 5600 lumnes at 54W. I'm not sure what I am saving here to keep the same about of lumens. Folks keep saying you don't need as many lumens as the light is output differently but to me a lumen is a lumen.
aczlan
Good Morning
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Zerk
Veteran Member
7700 lumens for 175 watts vs. 4000 lumens for 38 watts consumed. Lets do some math
The first bulb uses 175 watts so lets say it is on 10 hours per night. Some winter nights might be quite a bit more and also very cloudy days, but lets just say 10 hours per day x 365 days per year. so 3650 hours per year. Power consumption of 175 watts x 3650 hours is 638,750 watt hours or 638.75 kilowatt hours at lets say $0.13 per kilowatt hour is $83.04 per year to run on average If we use all the above parameters.
Now the LED which does only produce a little more than half the light :
So 10 hours again, so 3650 hours at 38 watts consumed per hour is 138,700 watt hours or 138.7 kilowatt hours x $0.13 per kilowatt hour is $18.03 per year to run it. A savings of 83.04-18.03= $65.01 per year savings. and lets say they would both last 10 years, which I think is reasonable, then your savings would be $650.10. You would be ahead to throw away your present bulb and get 2 LED's and still be ahead hundreds of dollars...
Oh, and for you still running 300 watt incandescent flood lamps as yard lamps and you know who your are... well.. there is not much hope for your bank account!
WTF are you rattling on about?
How bright do you want the light is the question. I want a bright light, since it is the only one I have outside. I am not looking to make some kind of statement, and show that I am a modern man or eco warrior.
Zerk
Veteran Member
Really? You better put it on credit card.
sixdogs
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That says it all and I'm in the same boat. There doesn't seem to be an accurate way to compare light output to power input. When I want a 100W or 150W light in a rom, people talk about an LED that puts out the equivalent of 60W. Aren't they paying attention. I want 100W or 150W and not 60W.
A am missing some part of this and it doesn't all add up.
Zerk
Veteran Member
Unless you bought it for light.7700 lumens for 175 watts vs. 4000 lumens for 38 watts consumed. Lets do some math
Now the LED which does only produce a little more than half the light :
You would be ahead to throw away your present bulb and get 2 LED's and still be ahead hundreds of dollars...
May God Have Mercy On Your Soul - Billy Madison - YouTube
