Outdoor / Porch
Outdoor / Porch LED savings: incandescent vs LED
Switching the 4 bulbs in a outdoor / porch from 100W incandescent to 14W LED cuts each bulb draw by 86%. Running them 8 hours a day, that saves about 1,004 kWh and roughly $191/year at the 2026 US-average rate of 19 cents per kWh, or about $1,910 over 10 years.
Incandescent vs LED for a outdoor / porch
| Metric | Incandescent | LED |
|---|---|---|
| Watts per bulb | 100 W | 14 W |
| Total wattage (4 bulbs) | 400 W | 56 W |
| Energy per year | 1,168 kWh | 164 kWh |
| Cost per year | $222 | $31 |
How the savings are calculated
Energy use is bulbs x watts x hours per day x days per year, divided by 1000 for kWh. For this outdoor / porch: 4 x 100W x 8h x 365 days is 1,168 kWh/year with incandescent, versus 164 kWh/year with LED. The 1,004 kWh difference times $0.16 is the annual saving. At about $16 for 4 quality LED bulbs, they pay for themselves in roughly 1 month.
Bulb life and replacement savings
A typical LED lasts about 25,000 hours versus roughly 1,000 hours for an incandescent, so one LED outlasts around 25 old bulbs. At 8 hours a day, the LEDs in this outdoor / porch should last well over a decade before replacement, on top of the energy savings above. LEDs also run cool, which slightly reduces summer cooling load.
Frequently asked questions
How much do LED bulbs save in a outdoor / porch?
Switching 4 bulbs from 100W to 14W LED saves about 1,004 kWh and $191 per year at 16 cents/kWh, based on 8 hours of use per day.
Are LED bulbs worth it for a outdoor / porch?
Yes. The 4 LED bulbs cost about $16 and pay for themselves in roughly 1 month, then keep saving $191 a year while lasting far longer than incandescent bulbs.
How much electricity do the lights in a outdoor / porch use?
With incandescent bulbs, about 1,168 kWh per year ($222). With LEDs, about 164 kWh per year ($31).
Disclaimer: For reference only. Consult a licensed professional.