Which is more efficient, 120 or 240? MVolt Exterior LED

[GraniteMark]

I am installing a new Lithonia LED exterior security light to replace a metal halide light. The existing wiring is 240v. The new light is multi-voltage (120-277v), 42W, .35-.15A . Would you stick with the 240v or convert to 120v? I'm not sure if there are any real efficiencies with either voltage on something this small. Thanks for your input!

 

[Lucien Nunes]

The difference would be trivial so stick with what you have. If very long cables are involved there would be an advantage in using 240V, because the power loss in the cable would be four times higher at 120V due to the higher current. However, minor variations in efficiency in the driver circuit could wipe out much of that difference anyway.

 

[Megawatt]

I am installing a new Lithonia LED exterior security light to replace a metal halide light. The existing wiring is 240v. The new light is multi-voltage (120-277v), 42W, .35-.15A . Would you stick with the 240v or convert to 120v? I'm not sure if there are any real efficiencies with either voltage on something this small. Thanks for your input!

Granite Mark as far as your power bill think of this the higher the voltage the lower the current which means you won’t pull as much amperage
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Granite Mark as far as your power bill think of this the higher the voltage the lower the current which means you won’t pull as much amperage

If it was me I would go with 240vac good luck

 

[davesparks]

Granite Mark as far as your power bill think of this the higher the voltage the lower the current which means you won’t pull as much amperage

But you are not billed based on the current, you are billed based on the power.
Thanks to the LED driver circuit the power will be substantially the same at any voltage within its operating range.

 

[Megawatt]

But you are not billed based on the current, you are billed based on the power.
Thanks to the LED driver circuit the power will be substantially the same at any voltage within its operating range.

Maybe so Dave but he already has 240 available so why change ?
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But you are not billed based on the current, you are billed based on the power.
Thanks to the LED driver circuit the power will be substantially the same at any voltage within its operating range.

I don’t know about over the pond Dave but we get billed by KW per hour so the more current you use the higher your power bill. Current is your load or power usage.

 

[davesparks]

I don’t know about over the pond Dave but we get billed by KW per hour so the more current you use the higher your power bill. Current is your load or power usage.

Yes we are billed per kilowatt-hour, so the more power you use the higher your bill.
Current is not the load nor the power usage.
Current is what flows through the load, current is not power.
Power is the product of the current and the voltage, P(power) =I(current) *V(voltage)

This is the very basic science of electricity.

 

[Megawatt]

Yes we are billed per kilowatt-hour, so the more power you use the higher your bill.
Current is not the load nor the power usage.
Current is what flows through the load, current is not power.
Power is the product of the current and the voltage, P(power) =I(current) *V(voltage)

This is the very basic science of electricity.

Sure it is it’s OHMS
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Sure it is it’s OHMS

OHMS law but it’s still in a nut shell power

 

[davesparks]

Sure it is it’s OHMS
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OHMS law but it’s still in a nut shell power

This post makes no sense, what are you trying to say?

Ohms don't come in to this, the context of the thread is an LED driver circuit which is a constant power load and is therefore not a resisitive load.

Ohms law is not power in a nutshell!

 

[Megawatt]

This post makes no sense, what are you trying to say?

Ohms don't come in to this, the context of the thread is an LED driver circuit which is a constant power load and is therefore not a resisitive load.

Ohms law is not power in a nutshell!

Dave I was busy and didn’t have time to deal with you and your attitude