General information written September 30, 2026. Product specifications and safety guidance can change, so check the manufacturer's instructions for any light you own.
For a short outage, use battery or rechargeable lights, choose them for how long they run at a usable brightness, and place them where you can reach them in the dark. The peak lumen number on the package matters less than the mode you will actually use, the batteries you can keep fresh, and whether the light is safe around children. U.S. fire and health agencies also say to use flashlights, not candles, during an outage.
Quick Answer: Pick a Light for Each Job
- Handheld flashlight: for walking around the house and checking on things.
- Headlamp: for tasks that need both hands, such as cooking or helping a child.
- Lantern: for lighting a room from a stable surface.
- A small light near each bed: so you are not searching in the dark.
Ready.gov's basic disaster kit checklist lists a flashlight and extra batteries, along with a battery-powered or hand crank radio. It frames the kit around several days on your own, so lighting for a short outage is a starting point, not a full plan.
What Lumens Actually Tell You
Lumens describe the total light a device puts out in all directions. Candela describes how intense the brightest part of the beam is. A wide lantern and a narrow spotlight can share a lumen number and behave very differently, and for reaching far, candela matters more than lumens.
Many flashlights follow a voluntary North American standard called ANSI/NEMA FL 1, which sets how brightness and runtime are measured and reported. Under it, brightness is measured shortly after the light is switched on, and runtime is counted until output falls to 10 percent of that starting level. One flashlight maker points out that a light rated at 200 lumens still counts as running when it is putting out about 21. A revision published in 2025 reportedly adds optional reporting of regulated-output runtime, so read the label to see what a maker actually measured.
Published room-brightness recommendations come mostly from retailers and vary widely, so this guide does not set a lumen target. Instead:
- Find the lumen and runtime figures for the mode you would actually use in a room, not just the maximum.
- Ask which mode the runtime was measured in, and how bright the light is near the end of that runtime.
- Match beam shape to the job: wide and even for a lantern, focused for a flashlight.
- Treat missing specifications as a reason to ask questions, not as proof of quality.
Battery Types and What to Watch
- Single-use alkaline (AA, AAA, C, D): Energizer's publications give a shelf life of about 5 to 10 years in one FAQ and 5 to 7 years in another, at room temperature. Go by the date and storage advice printed on your package. Heat shortens shelf life.
- Rechargeable cells and built-in batteries: Energizer's care guidance says to charge rechargeable batteries at least every 6 to 9 months to preserve their life and to use a charger designed for that battery type. USFA says to use the charger supplied for the device and to plug it directly into a wall outlet, not into an extension cord or multiplug adapter.
- Coin cells: if a light or flameless candle uses them, keep the light and any spare cells away from young children. Energizer warns that a swallowed coin cell can lodge in the esophagus and cause serious injury or death in as little as two hours.
Do not mix old and new batteries or different types or makes in one light. Energizer says mixing raises the risk of leakage or rupture, and that leaked alkaline material is caustic and should not touch bare skin.
Room-by-Room Placement
These are practical suggestions, not tested results. Adjust them to your home.
- Bedrooms: keep a flashlight or small light within reach of each bed. USFA advises against lit candles in bedrooms and other sleeping areas.
- Hallways and stairs: store a light where you can find it by touch, and try it before you need it.
- Kitchen: a headlamp frees both hands. Do not rest lights on or beside hot surfaces. USFA advises keeping anything that can burn at least 3 feet from a furnace, water heater, and similar heat-producing equipment.
- Main living area: put a lantern on a stable table where it will not be knocked over, and keep any cord out of walking paths.
- Bathrooms: a small, dry, reachable light avoids fumbling with a phone. USFA also advises against lit candles in bathrooms.
Ready.gov also lists a fire extinguisher among additional supplies, and suggests keeping supplies at home, at work, and in the car.
Fire-Safe Alternatives to Candles
USFA's guidance is short: use flashlights, not candles, if the power goes out. The CDC agrees, and adds that fire trucks may have trouble reaching a home after a disaster.
- Flashlights, headlamps, and battery or rechargeable lanterns.
- Battery-operated flameless candles. USFA suggests these for people who like the look of candles. Check the package for stated brightness before counting on one for task lighting.
If you do use a lit candle, USFA says to use a stable holder, put it where it cannot be knocked down easily, keep it at least 12 inches from anything that burns, and blow it out when you leave the room or go to bed. The CDC adds that a candle should never be left burning unattended.
A Simple Battery Rotation Routine
- Write the purchase date on each pack, and note any date printed on the package.
- Store spares in a cool, dry place. Energizer recommends normal room temperature, roughly 68 to 78°F, and moderate humidity, and warns against hot places.
- Pick one date each year to test every light, replace expired or weak batteries, and recharge rechargeable units. Ready.gov recommends rethinking your kit yearly and replacing expired items.
- Remove batteries from lights you will not use for a long time. Energizer advises this for devices that sit unused.
- Dispose of old batteries as your local authorities direct. USFA says to tape battery ends and terminals and not to put lithium-ion batteries in trash or recycling bins.
A Quick Runtime Check
This is arithmetic, not a product claim. Suppose you want lights on for about 4 hours in each of two rooms. That is 8 light-hours per night. Multiply by the number of nights you want to cover, then compare the total to each light's runtime at the mode you would use. If that runtime is only a few hours, plan for spare batteries or a full recharge.
Limits and When to Ask a Professional
- Lights do not power medical equipment, refrigerators, or heating. If someone in your home depends on powered medical equipment, ask the equipment provider or a clinician about backup options.
- If a battery leaks, swells, or overheats, stop using that device and follow the manufacturer's instructions.
- If you are unsure whether a circuit is safe for charging, USFA advises having a licensed electrician test it.
- Follow your local fire department's guidance for your area.
What to Do Next
- Walk through your home tonight and note where you would reach for light in the dark.
- Check what you already own: which lights work, what batteries they use, and how old those batteries are.
- Fill gaps by job (bedside, hands-free, room lantern) before buying anything.
- Keep candles out of your outage plan.
Related reading on this site: Home Wi-Fi During an Outage: Router, Modem, and Backup-Power Planning and Portable Power Station Runtime: A Room-by-Room Outage Planning Worksheet. More outage topics are in the Preparedness category.
Sources
- Ready.gov, Build a Kit
- U.S. Fire Administration, Fire Prevention and Community Risk Reduction (battery charging and disposal, 3-foot clearance from heat equipment)
- U.S. Fire Administration, Candle Fire Safety
- CDC, Proper Use of Candles During a Power Outage
- Energizer, Non-Rechargeable Batteries FAQ, Alkaline Batteries FAQ, Battery Care, and Dos and Don'ts
- ANSI/NEMA FL 1 explanations (secondary sources, not the standard itself): MSC Industrial Supply, Elzetta, US Made Supply, Safariland
This article is general educational information about home power-outage planning, not an endorsement of any product, brand, or service, and not a substitute for guidance from an electrician, your local fire department, or your local emergency management agency.
