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How Long Does a Solar Street Light Take to Pay for Itself?
A solar light has no running cost, so it pays for itself by replacing something you pay for now. The question is what. Here is a simple way to work it out for your place.
Step 1: what do you pay for light today?
Count the lights that burn all night, their wattage and your cost per unit. An outdoor floodlight left on for 12 hours every night uses real electricity. Add the cost of replacing bulbs. If you use a generator for lighting, add the fuel.
Step 2: add the cost of the dark
If you have had a break-in, a stolen item or an accident in the dark, add that cost too. Security lighting is cheaper than a single theft in many cases.
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Step 3: divide
Divide the price of the solar light by what you save each month. A KES 12,000 light that replaces KES 1,000 a month of tokens and bulbs pays back in about a year. If it replaces a generator or a night guard shift, it pays back sooner.
What to remember
Payback depends on your situation. If you have no lighting today, the solar light is not replacing a cost, it is buying safety. In that case, compare it with the price of what it protects.
Frequently asked questions
Is there a quick rule?
If you spend KES 1,000 a month on lighting, a KES 12,000 solar light pays back in about a year.
Does solar pay back faster at a business?
Often yes, because business lights run longer and the cost of theft is higher.
Need help choosing?
Tell us where you want the light and we will recommend the right size, even if it means a cheaper one.
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