How Much Do Christmas Lights Cost to Run in Texas?

By the TexasPowerCost Editorial Team — independent Texas electricity analysis · Last reviewed October 18, 2026 · how we analyze plans

Last updated: October 3, 2026  ·  7 min read

Holiday lights are the one load Texans add on purpose, and the cost swings from pocket change to a noticeable line on the January bill depending on a single choice: LED or incandescent. The arithmetic is simple — watts, hours, nights, your rate — and this page does it for every common decoration.

How much do Christmas lights cost to run for the season in Texas?

Multiply watts by 240 hours — six hours a night for 40 nights, Thanksgiving to New Year — and divide by 1,000 for kilowatt-hours (kWh), then by your rate. At 15.0¢/kWh, every 100 watts of decoration costs about $3.60 a season. Your Electricity Facts Label (EFL) rate will differ, and your TDU adds a delivery charge per kWh.

Illustrative season model: 6 hours × 40 nights, priced at a 15.0¢/kWh energy charge; your own EFL rate will differ and the TDU per-kWh delivery charge comes on top. String and bulb wattages are manufacturer figures (Christmas Lights Etc., updated January 2026, checked as of October 2026); inflatable and projector figures are typical — read the label on yours.

How many watts do Christmas lights use? LED vs incandescent

Per 100 bulbs: incandescent mini lights draw about 41 watts and LED minis about 7; incandescent C9 bulbs draw about 7 watts each (700 per 100) and LED C9s about 0.1 watt each (10 per 100). The bulb size matters more than the string length — one incandescent C9 bulb draws as much as a whole string of LED minis.

Those manufacturer figures also explain the end-to-end limits printed on the tags. Christmas Lights Etc. rates its incandescent mini strings for up to five sets connected end to end and its LED mini strings for up to 43, because the limit is the fuse in the plug against the strings' combined wattage; its incandescent C9 strings allow only two sets in a row while the LED version allows dozens. A standard 15-amp household circuit carries 1,800 watts and should not be loaded past 1,440 watts for hours at a time, which the big incandescent display in the table exceeds on its own. Spread a large display across outlets on different circuits, and count the watts before the extension cords go out.

Do LED Christmas lights really use less electricity — and when do they pay back?

Yes. The U.S. Department of Energy says LEDs use "at least 75% less energy" than incandescent lighting and that decorative LED strings "are no different"; the holiday-string wattages above show savings of roughly 80% on minis and 99% on C9s. Whether the purchase pays back depends on which bulb you are replacing.

LEDs also run cool, which is why manufacturers allow so many strings in a row and why they are the safer choice on a dry tree, and they typically last many more seasons than incandescent bulbs, which shifts the payback further in their favor. The one thing they do not do is make a display free: 1,000 LED minis still draw about 69 watts, and a dozen inflatables are a dozen fans.

How much electricity does a Christmas inflatable use?

Most 6–8 foot airblown inflatables draw well under 150 watts for the fan and LEDs together — call it 100 watts as a planning figure and read the adapter label for yours. At six hours a night that is 0.6 kWh, about 9¢ a night and $3.60 for a 40-night season at 15.0¢/kWh.

The cost climbs with the habit, not the hardware. Inflatables left running all night draw the same 100 watts for 12 hours instead of six, doubling the figure, and a yard of four running dusk to dawn is about 144 kWh a month — $20 or so, and the kind of steady load that keeps a December bill over a bill-credit threshold. The fan is also the failure point: a timer that lets it deflate overnight extends its life and halves the cost at once. Projectors are lighter still, typically a few watts to around 30 — check the label — so a laser display is among the cheapest decorations to run.

Do Christmas lights raise your electric bill a lot?

In dollars, rarely: a modest LED display adds a dollar or two to the month and a large incandescent one $50–$70. In kilowatt-hours, sometimes a lot, and in Texas kWh can matter more than dollars. A 200-watt display running 240 hours adds about 48 kWh — enough to carry a December bill across a 1,000 kWh bill-credit threshold.

On a bill-credit plan, crossing that line from below can switch on a $30–$100 credit and lower your effective rate; dropping below it in a mild month can do the reverse, which is the 1,000 kWh illusion in miniature. The decorations are not the problem; the plan structure is. If your December bill looks wrong, the Bill Analyzer will show whether a threshold moved your rate, and why winter bills run high explains the heating load that usually dwarfs the lights. One more Texas detail: the per-kWh part of your TDU delivery charge applies to every added kWh too, so the marginal cost of a decoration is your energy rate plus delivery, not the energy rate alone.

Do timers and smart plugs save money on holiday lights?

Yes, in proportion to the hours they remove. A six-hour timer instead of dusk-to-dawn halves every figure on this page, and an outdoor-rated smart plug does the same with a schedule you can change from the couch. On a 100-watt inflatable that is about $3.60 a season saved; on a 2,000-watt incandescent display, about $70.

Timers matter most on time-of-use and free-nights plans. If your plan charges more during evening peak hours, running lights 5–9 p.m. is the most expensive window available; if it offers free nights, a display that starts at 9 p.m. costs nothing in energy. Do smart plugs save electricity in Texas covers where the plugs pay and where they do not; holiday lights are one of the few loads where the answer is clearly yes, because the schedule is the whole saving.

How many light strings can I connect, and do I need a GFCI outlet?

Connect only as many strings as the tag allows, use outdoor-rated strings outside, and plug outdoor decorations into GFCI-protected outlets — the Electrical Safety Foundation International's (ESFI) standing guidance. As a general rule ESFI says never to connect more than three strings of incandescent lights together; manufacturer tags may allow more or fewer for a specific product.

ESFI also recommends buying decorations approved by a nationally recognized testing lab such as UL, Intertek or CSA, and cites National Fire Protection Association estimates of roughly 860 home fires a year started by holiday decorations plus about 210 by Christmas trees. The electrical rules behind those numbers are the ones above: overloaded strings, indoor cords outside, and outlets without ground-fault protection in wet weather. A GFCI outlet or a GFCI adapter costs little; so does checking that the extension cord is rated for outdoor use and the total watts on it stay under the circuit's continuous limit. (See ESFI's holiday lighting safety page.)

How to estimate your own display in three steps

1. Add up the watts

Read the wattage on each string, inflatable and projector tag, or use the typical figures in the table on this page. Multiply per-string watts by the number of strings.

2. Multiply by hours per night and nights per season

Watts × hours × nights ÷ 1,000 = kilowatt-hours. A six-hour timer over 40 nights is 240 hours; a display left on from dusk to dawn roughly doubles it.

3. Multiply by your rate

Use the energy charge on your Electricity Facts Label plus the per-kWh part of your TDU delivery charge, because every extra kWh is billed at both. Then check whether the added kWh move you across a bill-credit threshold.

Key Takeaways

• Per 100 bulbs, incandescent minis draw about 41 W and LED minis about 7 W; incandescent C9s draw about 7 W per bulb and LED C9s about 0.1 W (manufacturer figures, January 2026).
• At six hours a night for 40 nights and 15.0¢/kWh, five LED mini strings cost about $1.26 a season, five incandescent strings $7.38, and 100 incandescent C9 bulbs $25.20 versus 36¢ in LED.
• LEDs pay back in two winters on C9 rooflines (about $25 a season per 100 bulbs) but take 6–10 seasons on mini lights (about $1.23 a season per string).
• A 200 W display adds about 48 kWh a season — enough to move a Texas bill across a 1,000 kWh bill-credit threshold — and ESFI says never to connect more than three incandescent strings end to end.

Common Questions

Do Christmas lights use a lot of electricity?

LED lights, no; incandescent C9 bulbs, yes. A 100-bulb string of LED mini lights draws about 7 watts, so even ten strings use less than a single old 75-watt bulb. A 100-bulb run of incandescent C9 lights draws about 700 watts — roughly a space heater on its low setting — and a large incandescent display can draw 2,000 watts, more than a kitchen circuit should carry. The bulb type matters far more than the number of strings.

How much do Christmas lights cost to run for a month?

At six hours a night for 30 nights and an illustrative 15.0¢/kWh energy rate, five strings of incandescent mini lights (about 205 watts) cost about $5.50 for the month; the same five strings in LED cost under $1. A 100-bulb incandescent C9 run costs about $19 a month; the LED version about 30 cents. Your EFL rate and your TDU delivery charge per kWh change the exact figure, not the ranking.

Do LED Christmas lights really save money?

Yes on electricity, and whether the purchase pays back depends on the bulb size. The Department of Energy says LEDs use at least 75% less energy than incandescent, and manufacturer wattages for holiday strings show closer to 80 to 99 percent. On mini lights the saving is about $1 to $1.50 per string per season, so a pricier LED set takes several seasons to pay for itself; on C9 bulbs the saving is about $25 per 100 bulbs per season, so LEDs pay back in the first winter.

How much electricity does a Christmas inflatable use?

Most yard inflatables run a small fan plus LED lighting and draw well under 150 watts — check the label on the plug-in adapter for the exact figure. At 100 watts for six hours a night, one inflatable uses 0.6 kWh a night, about 9 cents at 15.0¢/kWh and roughly $3.60 across a 40-night season. Three or four of them running all night is where the cost starts to show.

Do Christmas lights raise your electric bill a lot?

A modest LED display adds a dollar or two to the month; a large incandescent display can add $50 to $70. The sneaky effect in Texas is not the dollars but the kilowatt-hours: a 200-watt display running 240 hours adds about 48 kWh, which can push a December bill across a plan's 1,000 kWh bill-credit threshold in either direction and change your effective rate more than the lights themselves cost.

How many strings of Christmas lights can I connect together?

Follow the number printed on the string's tag, which is set by its wattage and the fuse in the plug. As a general safety rule the Electrical Safety Foundation International says never to connect more than three strings of incandescent lights end to end; manufacturers rate LED mini strings for dozens of sets because they draw so little. Keep the total on any one outlet well under the circuit's 1,440-watt continuous limit, use outdoor-rated strings outside, and plug outdoor decorations into GFCI-protected outlets.

Key Terms

Kilowatt-hour (kWh) · Bill Credit · Effective Rate · TDU Charge · Free Nights Plan · Full Glossary →

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