Hi Youtubers! I'm Al Gracian from albopepper.
com Are youlooking at doing some growing indoors, using artificial lights? How much will it cost you to run those lights? Is it worth investing in some more expensivebut, more efficient lights, such as LEDs? For example, I recently reviewed some TranscendLED bulbs that replace conventional T5 fluorescents.
These are not cheap bulbs by any means.
So it raises the question: How long wouldit take for the investment to pay for itself in energy savings? Today, we'll quickly look at the basic mathfor determining a pay off period.
But I'm going to show you a cool resourcethat I've developed and put on my site that will do the math for you! Now, in order to calculate the cost of usinga light, there are 3 important parameters that we must know: Your cost of electricityper kWhr.
The hours of operation.
And the EXACT wattage consumption of the lightyou are using.
NEVER assume you have been provided reliablewattage stats.
Some LEDs are right on.
And some are way off.
Even fluorescent lights can state inaccuratepower draws.
I advise using a Kill-A-Watt meter if youwant to test it for yourself.
Here's the formula for determining the powerconsumption for any electrical device: You take the wattage draw of the device, timesthe hours of operation per day.
Now yhis gives you the watt hours.
But we need to know kilo-watt hours, whichis a thousand watt hours.
So divide by 1000.
This is your kilo-watt hour draw per day.
Multiply by your electrical rate which isper kilo-watt hours.
And that's your price per day.
To know the monthly cost, simply multiplyby 30, or 365 for a whole year of continual use.
Let's look at a short cut to speed up theprocess and offer you even more information! Let's pop over to albopepper.
Under site prep –> light, we have a CostSavings Calculator.
In addition to some general buying tips, I'vecompiled the formulas to help you in evaluating a light or even comparing TWO different ones! For today's example we'll reference my previousTranscend LED light review.
These lights were retailing at $70 per bulb.
So how long until these lights pay for themselves? Let's consider 2 very different case studies: First, we have Samantha from Idaho.
She's a small-scale garden hobbyist who'sinterested in a cost effective way to grow some strong seedlings.
She's been using T5 fluorescents but they'veburned out.
And now she wonders of it's worth upgradingher bulbs to the Transcend LEDs.
com she starts plugging in herusage numbers.
She only plans on using her lights about 8weeks each Winter.
So let's say 56 days per year.
Each day they run for 17 hours.
Her 4 bulb, 4 foot T5s actually draw 205wat the wall.
Her electrical rates are really cheap in herstate only 10 cents per kWhr.
So she inputs that rate as dollars in a decimal.
And immediately she can see that it costs35 cents each day to run her lights.
Using them 56 days a year means an annualcost of $19.
So is it worth an upgrade based purely onelectrical savings? Well let's plug in the stats for the moreefficient LED, Light number 2.
She'll use the same run time.
But the wattage of this light, at the wall, is only 92w for all 4 bulbs.
So the daily energy cost is only 16 cents.
Now what about the pay off period? In this 3rd section Samantha plugs in thecost for buying some new fluorescent bulbs.
And next the price is for the more expensive, but more efficient LEDs.
And there it is! To recoup her investment it would take over24 years of just growing seedlings for the Spring.
Now the warranty is good for 5 years, butthe pay off period FAR exceeds that.
Now, we do have one more example.
Let's fly over to Hawaii where we meet upwith Bernie.
He has a large, indoor growing facility wherehe produces herbs and greens year round.
They're sold commercially to local restaurantsand grocery stores.
His T5s produce excellent growth, but he'strying to reduce his electrical costs which also include cooling his facility.
Once again at albopper.
com, Bernie can quicklyplug in his figures.
Now electricity is pretty expensive in Hawaii25 cents per kilowatt hour.
Also, this facility operates 365 days a year.
Just changing those 2 parameters makes a massivedifference in the pay off period.
In about 1.
5 years, Bernie has broken evenand that doesn't even include the cost of savings in cooling.
Meanwhile, he still has 3.
5 years left onhis warranty! Well guys, hopefully this shows how this calculatorcan help you in determining the costs of using artificial lighting and even comparing differenttechnologies.
If you like this concept and appreciate thework that I put into it, please gimme a thumbs up! And be sure to share this resource with othersto help them out! Subscribe if you haven't already.
And as always guys, Happy Gardening!.