Incandescent Bulb vs LED Energy Savings Compared

Buy the LED. An 800-lumen LED gives you the same light as a 60-watt incandescent on roughly a seventh of the power. At 2026 electricity prices it earns back its purchase price in about two months of ordinary use, then keeps saving for years. The whole difference comes down to two numbers: how many watts the bulb draws, and how many hours it lasts before you replace it.

The only incandescents worth keeping are the specialty types that federal efficiency rules still exempt, such as appliance bulbs and heat lamps. Everything below compares a standard 60-watt incandescent with its 800-lumen LED replacement, using figures published by the Department of Energy, the Energy Information Administration and two independent cost models. We did not test bulbs ourselves for this piece. Where the sources disagree, we say so.

The incandescent wins on one thing: the price on the shelf. JouleIO's 2026 payback model prices it at $1.00 against $1.50 for the LED. Every other number goes the other way.

It turns 60 watts into about 800 lumens, which works out to 12 to 18 lumens per watt, according to Liora Light's summary of the standards. The rest leaves the bulb as heat. Across 30 bulbs, that comes to about 1,620 watts of waste heat compared with 270 watts for 30 LEDs. JouleIO puts the extra air-conditioning cost at $30 to $100 a year, depending on climate. The rated life is about 1,000 hours, so covering one LED's 25,000 hours means buying and throwing away 25 bulbs. Once you add electricity, that adds up to $307 against $44 for the LED.

Who should buy one: only someone filling a socket that has no standard LED option, such as an appliance bulb, a heat lamp, a colored bulb or a three-way bulb. These specialty types remain exempt from federal efficiency standards.

The LED matches the incandescent's light on a fraction of the power. The DOE's purchasing guidance lists 5.9 to 10.5 watts for an 800-lumen LED. The example used in GreenChoice's September 2026 buying guide, the GE Relax HD A19, draws 8.5 watts. It is 2700K warm white, dimmable, and fits a standard medium base. ENERGY STAR-qualified LEDs must be rated for at least 10,000 hours, and DOE gives 25,000 hours as typical.

The weak spots are small. The LED costs more up front, about 50 cents more per bulb in JouleIO's model. LEDs also vary in efficiency. DOE's lifetime energy cost for an 800-lumen bulb is $23.19 for a standard ENERGY STAR LED but $11.60 for the best available model, so two bulbs with the same brightness can differ by about $11 over their life. To avoid paying for the weaker one, pick the lumens you need first, then choose the lowest wattage at that brightness. The sources here do not include a dated price at a named retailer, so check the shelf price yourself before you buy.

The headline claims also vary by source. DOE says LEDs use up to 90% less energy and last up to 25 times longer. A PIRG-led letter to the Senate says up to 85% less energy and up to 50 times longer. The GE example uses about 86% less energy than a 60-watt incandescent, which falls inside both claims.

Who should buy one: anyone replacing a standard bulb in a lamp or fixture that stays on for more than a few minutes a day.

Three things decide this, and the first matters far more than the other two.

Power draw sets the size of the savings. Every hour a socket is on, the LED uses 51.5 fewer watts. That gap stays the same however long you keep the bulb, so a socket that is on more hours saves more money.

Your state's rate scales the result. In 2025, residential electricity cost 8.20 cents per kWh in North Dakota and 35.72 cents in Hawaii. At those rates, the same bulb saves about $4.62 a year in North Dakota and about $20.14 in Hawaii. Even at the lowest rate, the LED earns back its price within the first year. Prices are also still rising: the EIA forecasts 18.59 cents for 2027, up from 18.20 cents for 2026.

Lifespan cuts the replacement cost. One rated LED replaces 25 incandescent bulbs. At $1.00 each, that is $25 of bulbs you never buy, and 24 fewer trips up the ladder.

Switch by hours, not by room. DOE recommends putting ENERGY STAR LEDs first in any fixture that runs 3 or more hours a day, because the savings grow with every hour on. In most homes, that means the lights you leave on through the evening, such as overhead kitchen fixtures and living room lamps. Your own habits decide the order, though, so spend a week noticing which switches stay on. A room-by-room energy check will turn up the same answer along with other waste.

A closet or garage bulb that runs a few minutes a day still pays back, just slowly. Replace those when they burn out rather than throwing away a working bulb. Leave oven, appliance and heat-lamp bulbs alone, since the rules exempt them and the sources here do not compare LED options for them. If you live somewhere hot, switch the fixtures you run on summer evenings early, because the incandescent's waste heat also adds to your cooling bill.

The environmental case follows from the same two numbers. Less power means less generation, and natural gas still supplies about 40% of US electricity in the EIA's 2026 outlook. A longer life means one bulb goes to the trash instead of 25. At national scale, DOE estimated that LEDs saved 1.1 quads of energy in 2017 alone, roughly the yearly energy use of more than 14 million average US households. When the previous administration adopted the 45 lumens-per-watt rule, it projected the rule would cut carbon emissions by 222 million metric tons over 30 years. The sources here do not compare the energy and materials used to make each bulb, so that part of the picture is not covered.

Replace every standard incandescent you use daily with an 800-lumen ENERGY STAR LED, starting with the fixtures that run 3 or more hours a day. It costs about 50 cents more per bulb, recovers its full price in roughly two months at the 2026 average rate, and saves about $10 a year per bulb. When choosing between LEDs, buy the lowest wattage at the brightness you need, because DOE's figures show the most efficient models halve the lifetime energy cost of a standard one. Keep incandescents only for exempt specialty sockets like oven lights and heat lamps. That advice holds whatever Congress or DOE decides about the efficiency rules.