Floodlights Halides

[Robw54]

We run a load of metal halides rated at 70w each which are about 10yrs old and looking to replaced with 70w LEDS.

Been arguing with electric company because based on what they are rated to use (assuming 70% efficient) - they are appearing to use a shed load of electric each night (based on other back ground usage) they must be pulling 300-400w a piece which seem hard to believe.

Any one swapped out to LED and see a dramatic drop in consumption?

 

[Cjm]

Surely metal halides are normally 250 or 400watt?

 

[Sharpy]

As above I don't know of any "white" light sources other than LED that are easy on electricity. Are you sure that they only draw 70 watts?

 

[Pheasant Surprise]

We run a load of metal halides rated at 70w each which are about 10yrs old and looking to replaced with 70w LEDS.

Been arguing with electric company because based on what they are rated to use (assuming 70% efficient) - they are appearing to use a shed load of electric each night (based on other back ground usage) they must be pulling 300-400w a piece which seem hard to believe.

Any one swapped out to LED and see a dramatic drop in consumption?

Has someone ‘upgraded’ the lamps to a higher wattage (unbeknown to you). Can you get a clamp meter on the circuit back at the board to check how much current they’re drawing?

 

[Sharpy]

Have just done a bit of googling and the short version is that there should be twice the lumen output per watt from led versus metal halide.
So if you replace a 70 watt metal halide with a 70 watt led you will get twice the light. To save power but maintain the amount of light replace with an led of half the powet consumption.

 

[Pheasant Surprise]

Have just done a bit of googling and the short version is that there should be twice the lumen output per watt from led versus metal halide.
So if you replace a 70 watt metal halide with a 70 watt led you will get twice the light. To save power but maintain the amount of light replace with an led of half the powet consumption.

As above, the halides may in fact be higher wattage than the OP thinks. I’m not doubting your googling research but if so he or she may be disappointed with the lumens output coming from the LED source.

Best to trial a few different brands, styles and colour temps first.

 

[Robw54]

As above, the halides may in fact be higher wattage than the OP thinks. I’m not doubting your googling research but if so he or she may be disappointed with the lumens output coming from the LED source.

Best to trial a few different brands, styles and colour temps first.

I've put in some 50w LED but don't think they output the same light as 70w halides, so it would be 70w for 70w or possibly 100w LEDs to give similar light on what I can see from those put up.

I wasn't going to bother swapping them but if they are using what I think they are then it will pay in 1 yr to change them. That or there is some issue with our night rate meter!

I've read the ballast will use 15% and the bulbs of course dim over time- but I hadn't equated that to increased consumption and certainly not of the usage we seem to be getting.

 

[ACEngineering]

I have 2 x 70watt metal halide light units so it is possible.

Mine were orginally sodium but i changed the bulbs as didnt like the yellow light.
I have anther 2 x 150 watt halide aswell they replaced 2 x 500watt halogen that eat electric and bulbs for fun.