# How much does 1500w LED 18/6 run up light bill?

Does anyone know how much a LED 1500w light will run up the light bill??? I live in WV.

You need your electric bill to calculate kwh (kilowatt hours) it will tell you how much you pay for 1000 watts for an hour (kwh) then simply do the math, your kwh price X 150% (1500 watt) will tell you one hour of run time, thatâ€™s if itâ€™s actual 1500 watt and not the replacement claim most led manufactures advertise. You need to know the actual wattage of the unit.
Example:
11 cents per kwh
11 X 150% = 16.5 cents pr hour x 12 hours = \$1.98 a day

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Not much at all because the light wonâ€™t actually be anywhere near 1500 watts, more like 250 real watts, chinese marketing BS and lies.

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Will be lucky if it is 250 watts off the wall.

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Here is a handy calculator. Be sure to check the label on your light (or the ad on Amazon, if thatâ€™s where you got it from) to find out what the true wattage of the light is.

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All types of lighting fixtures, not just LED illumination should be measured in Lumens not watts, Watts is consumption not output. All lighting calculations are figured in Lumens or Candela depending on its use. Lumens is total output, Candela is a focused area calculation like for a stage, arena etc Donâ€™t hold me exactly, itâ€™s been 40 years since I was in the business.

That would be fine if you could trust the manufacturer: they donâ€™t HAVE to tell the truth there but they DO for wattage draw. Also; lumens is not the metric growers use but instead use Âµmol/joule/m2.

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These days when talking plant lights, PAR, PPFD, Âµmol/joule/m2 are more useful than lumens. Lumens are the measurement of light output that is visible to the human eye. PAR (photosynthetic active radiation) is the light radiation which plants â€śseeâ€ť to photosynthesize.

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To expand on what Myfriendis and Hellraiser have said, lumens are not relevant, as plants need specific wavelengths of radiation and not all of that spectrum is visible. PPFD is the measure to be used when talking about light intensity. In fact, different light spectrums (more toward the red) are what matters when you get to flowering. You can have a very high lumen output light, but if it is not the proper spectrum, then you are going to have trouble flowering your plant.

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Iâ€™m far from a â€śGrowerâ€ť. Me, I do 4-6 Autoplants on a 90 day cycle & I do well with 5 30Watt full spectrum LED floods I purchase from Aliexpress.
Yes you are right, but most here I donâ€™t think are into high priced growing outfits.
And all I was getting at was Watts is consumption. I didnâ€™t even touch on wavelengths.

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Unfortunately we have to convert for the initiates to LED lights haha. 50 watts/per works for MH/HPS, CMH, LEC etc along with older LEDâ€™s. With the latest stuff (Top bin Samsund diodes) that number actually goes down quite a lot: 25 to 30 watts/square foot. Which is a 50% savings in electrical usage. I had my bill go down \$60 the first month. Lights were paid for in 6 months from that alone.

Heh. You folks have really strayed from the questionâ€¦

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