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Security answers that lock the worry out.

From a motion light that finally makes the back door feel less dark to the honest question of whether a monitored alarm is worth $40 a month, home security is mostly calm, boring decisions made in advance — not fear. These tools compare the real costs, rank the door-and-window fixes that matter, sanity-check the actual break-in numbers for your neighbourhood, and walk you through trips, rentals, packages and pets step by step. Most break-ins are opportunistic: lock the opportunity, keep the receipts, sleep properly. The full detailed report costs less than a coffee: $2.95.

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Motion Light Running Cost: Watts, Hours and Dollars per Year

A modern alarm keypad glowing softly beside a smartphone on a dark bedside table, deep charcoal shadows with warm rose-red light spilling from a hallway beyond — home alarm and monitoring guide

The best deterrent in home security is also the cheapest to run, but only if the maths holds — and it does. This calculator takes the number of lights, the watts each one draws, the average active hours per night and your electricity rate, and returns the annual kilowatt-hours and dollars, the monthly figure, and the ten-year cost. It also shows the comparison that makes the case: what the same lights would cost left burning all night, which is typically five times more. The honest numbers are tiny — a 20W LED motion light active two hours a night runs at well under $5 a year at typical rates — which is exactly why motion lighting belongs on every entry path, and why swapping old 150W halogen fittings for LEDs pays for itself inside a year.

⚡ Free instant check

Work out what your motion lights actually cost to run per year — watts, active hours and your electricity rate — and compare that against leaving lights burning all night, so darkness costs you nothing to fix.

❓ Motion Light Running Cost: The Lighting Maths — FAQ

How much electricity does a motion light use?

A 20W LED motion light active about two hours a night uses roughly 14.6 kWh a year (20 × 2 × 365 ÷ 1000) — under $5 a year at typical electricity rates. Old 150W halogens cost roughly ten times as much to run for the same job.

Do motion lights really deter burglars?

Yes, as part of the boring basics: a sudden light surprises someone checking doors and windows, and burglars avoid lit, visible houses. They deter best when they cover the route from the street to your doors rather than just the driveway.

Should I leave outside lights on all night instead?

Only if you want the bill to prove the point — leaving a 20W light on all night (10 hours) costs about five times more than a motion light active for two hours, for worse effect: a light that is always on teaches nobody anything, while a light that snaps on gets attention.

More systems & alarms tools

Security System Cost Compare: Self-Install vs MonitoredfreeCamera Setup Budget: What a Home Camera System Really CostsfreeSmart Lock Decision: Is It Right for Your Door?freeAlarm Response Time Reality Check: What Monitoring Really Doesfree

🔐 All security tools

Every tool answers instantly from our own knowledge and calculators — no AI wait, no account. Honest maths and plain-language guidance, always educational and never a guarantee: crime risk is neighbourhood-specific and most break-ins are opportunistic, so each answer tells you what is generally true, what to check about your own home and street, and what the next step should be — never hype, never fear-mongering. Results are estimates and planning aids, not professional security assessments, and nothing you type is stored. Want the deeper, personalised version? Each has a $2.95 full report.

🚨 Systems & Alarms
Security System Cost Compare: Self-Install vs MonitoredfreeCamera Setup Budget: What a Home Camera System Really CostsfreeMotion Light Running Cost: The Lighting MathsfreeSmart Lock Decision: Is It Right for Your Door?freeAlarm Response Time Reality Check: What Monitoring Really Doesfree
🔑 Locks & Safes
Lock & Hardening Upgrade Priority: Doors and Windows FirstfreeSafe Purchase Decision: What to Store and What It Is WorthfreeSecurity on a Budget: What Your Dollars Buy FirstfreeKey Management Habits: Spares, Lenders and LockoutsfreeGarage & Workshop Security: The Overlooked Entryfree
🏡 Neighbourhood & Habits
Neighbourhood Break-In Sanity Check: Real Risk, Real NumbersfreeVacation Security Checklist: Away for a Week or MorefreeTrip Security Checklist: Out for the Day or a Night AwayfreeRental Security Options: No-Drill Fixes That WorkfreePackage Theft Protection: Porch Pirates and ParcelsfreePet-Safe Security: Protecting Home and Animals TogetherfreeSeasonal Security Routines: Summer and Winter Patternsfree
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Educational information only — not professional security advice, and never a guarantee of safety or outcomes. Crime risk varies by neighbourhood, and the most effective measures are usually the boring ones: locked doors, working lights and habits you keep. The tools give plain-language estimates and checklists, not inspections or security assessments. For a genuine threat, a licensed security professional or your local police non-emergency line is the right next step. Refunds honoured.
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