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Smart Lighting Calculator — LED Upgrade ROI

Calculate savings from switching to smart LED bulbs with automation scheduling

Annual Savings

$268

kWh Saved

1,861

Payback

11 mo

Savings Breakdown

LED Savings
$261/yr
Automation
$7/yr
Total Savings
$268/yr
kWh Saved
1,861

Cost Comparison

Old Annual Cost$307
New Annual Cost$39
Investment$240
Payback11 months

Long-Term ROI

5-Year Net Savings$1,098
Lifetime Net Savings$3,425

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Example Calculations

1Typical Home (20 bulbs, 60W to 9W LED)

Inputs

Bulbs20
Old Wattage60W incandescent
LED Wattage9W
Usage5 hours/day

Result

Annual Savings$268
Investment$240 (20 bulbs × $12)
Payback11 months

Energy savings: 20 × (60-9) × 5 × 365 / 1000 × $0.14 = $261. Automation (15%): $7. Total: $268.

2Small Apartment (10 bulbs, CFL to LED)

Inputs

Bulbs10
Old Wattage13W CFL
LED Wattage9W
Usage4 hours/day

Result

Annual Savings$11
Investment$120 (10 bulbs × $12)

CFL to LED savings are small (4W difference): 10 × 4 × 4 × 365 / 1000 × $0.14 = $8.18. Automation adds ~$3.

Frequently Asked Questions

Q

How much do smart LED bulbs save compared to incandescent?

A 9W LED replaces a 60W incandescent, saving 51W per bulb. With 20 bulbs running 5 hours daily at $0.14/kWh, you save about $260/year in electricity alone. Smart automation adds another 10–15% by eliminating lights left on unnecessarily.

  • 60W incandescent to 9W LED = 85% energy reduction per bulb
  • 20 bulbs at 5 hrs/day save 18,615 kWh over 25,000-hour LED lifespan
  • LED lifespan: 25,000 hours vs 1,000 hours for incandescent—25x longer
  • Smart scheduling/motion sensing eliminates 10–15% of unnecessary lighting usage
Q

What is the payback period for smart LED bulbs?

At $8–15 per smart bulb, a 20-bulb setup costs $160–$300 upfront. With $260+/year in energy savings, payback is typically 7–14 months. Standard (non-smart) LEDs at $2–5 each pay back in 2–4 months.

  • Smart LED bulbs ($8–$15 each) add WiFi/Zigbee control and scheduling
  • Standard LEDs ($2–$5) provide the same energy savings without smart features
  • Smart bulbs add 10–15% extra savings from automation—worth it for 10+ bulb homes
  • Group buying (multi-packs) reduces per-bulb cost by 20–30%
Q

How does smart lighting automation save energy?

Smart automation saves energy through motion-activated on/off, daylight-responsive dimming, scheduled routines, and vacancy detection. Studies show 10–20% additional savings beyond the LED swap itself.

  • Motion sensors turn off lights in rooms left empty—saves 15–25% in those areas
  • Daylight harvesting dims lights near windows during sunny hours
  • Away-from-home routines prevent entire floors of lights from being left on
  • Dimming to 80% reduces power by 20% while being barely perceptible visually
Q

Should I use smart bulbs or smart switches?

Smart switches ($25–$50 each) are better for rooms with multiple bulbs on one circuit, while smart bulbs ($8–$15 each) are better for lamps and single fixtures. Switches require neutral wire and control all bulbs on the circuit; bulbs offer individual color and dimming control.

  • Smart switch: 1 device controls 4–8 bulbs on the circuit, lower per-bulb cost
  • Smart bulb: individual color/dimming control, no wiring needed, works in lamps
  • Switches need neutral wire—check before purchasing (older homes may lack it)
  • Smart bulbs are ideal for renters since no wiring changes are required

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Last Updated: Mar 25, 2026

This calculator is provided for informational and educational purposes only. Results are estimates and should not be considered professional financial, medical, legal, or other advice. Always consult a qualified professional before making important decisions. UseCalcPro is not responsible for any actions taken based on calculator results.

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