How to Choose the Right LED Bulbs
Buying LED bulbs can feel like reading a foreign language. The packaging is covered in numbers — 800 lumens, 2700K, 9W, 60W equivalent — and none of it tells you the one thing you actually want to know: will this light look good in my living room?
The good news: you only need to understand two numbers. Once you do, picking the right LED takes ten seconds and you'll never buy the wrong one again.
Forget watts — look at lumens
Wattage measures energy use, not brightness. That was fine when every bulb was an incandescent with a predictable brightness, but LEDs flipped that on its head: a 9-watt LED is as bright as a 60-watt incandescent.
Brightness is measured in lumens. Use this chart:
- 450 lumens — about as bright as an old 40W bulb. Accent lighting, bedside lamps.
- 800 lumens — as bright as an old 60W bulb. The workhorse. Living rooms, kitchens, general lighting.
- 1100 lumens — as bright as an old 75W bulb. Task areas, home offices, garages.
- 1600 lumens — as bright as an old 100W bulb. Utility spaces, workshops, exterior fixtures.
Ignore the "60W equivalent" marketing and match lumens instead. If the old bulb felt too dim, go up one step. Too bright, go down one.
Color temperature: the number that actually matters
Color temperature, measured in Kelvin (K), determines whether the light feels warm and cozy or cool and clinical. This is the number that will make you love or hate an LED bulb.
- 2200K–2700K (warm white): Yellowish, cozy. Feels like a traditional incandescent. Best for bedrooms, living rooms, dining rooms.
- 3000K (soft white): Slightly warmer than daylight but still crisp. Best for kitchens, bathrooms, hallways. This is what most people want in 80% of a home.
- 3500K–4100K (cool white): Neutral white with a slight blue tinge. Best for offices, workspaces, garages, task lighting.
- 5000K–6500K (daylight): Very blue, mimics midday sun. Best for workshops and laundry rooms. Not recommended for living spaces — feels harsh.
The safe default: 2700K for bedrooms and living rooms, 3000K for kitchens and bathrooms, and 4000K for garages, basements, and workshops. If unsure, go one step warmer than you think you want — cooler light almost always feels harsher than expected.
What about wattage and cost?
Once you've picked lumens and Kelvin, wattage becomes irrelevant. The LED will use 8–12 watts to produce 800 lumens. Compared to the 60-watt incandescent it replaces, that's a 75–85% reduction in energy use.
Running costs at a typical 12¢ per kWh rate:
- 60W incandescent: ~$7.20/year per bulb (at 3 hours/day)
- 9W LED: ~$1.10/year per bulb (same usage)
- Savings per bulb: ~$6.10/year
In a home with 25 bulbs, that's $150 per year. With LEDs at $2–$4 each in multipacks, the payback is under six months. And LEDs last 10–25 years, versus 1–2 years for incandescent.
Dimmable and non-dimmable
Most LED bulbs are now dimmable — but not all. If you have a dimmer switch, always check that the packaging says "dimmable." And be aware: old dimmer switches designed for incandescent bulbs often don't work properly with LEDs. They'll cause flickering or buzzing.
If you replace dimmable bulbs and see flickering, the fix is usually a new LED-compatible dimmer ($15–$35). Try one first — if your current dimmer was installed in the last 5–8 years, it's probably already LED-compatible.
Bulb shapes matter too
The base is often the same, but the shape affects how light is distributed:
- A19 (standard): The classic lightbulb shape. Works in almost every fixture.
- BR30: Reflector bulb for recessed ceiling cans. Directional light downward.
- MR16 / GU10: Small spots, typically for track lighting and specific recessed fixtures.
- G16.5 / Candelabra (E12): Small decorative bulbs for chandeliers and sconces.
- PAR series: Outdoor floodlights.
- Tube (T8): For under-cabinet and garage strip fixtures.
Safest method: bring the old bulb to the store, or read the code printed on the base. Base size is there too — E26 (standard), E12 (candelabra), GU10, etc.
Buying strategy
Don't buy individual bulbs unless you need just one. Multipacks (4, 8, or contractor packs of 12–24) bring the per-bulb price down to $1.50–$2.50. Buying in bulk also means you have spares when you decide to swap a room.
For most homes:
- 8-pack of 2700K, 800-lumen standard bulbs for living spaces
- 4-pack of 3000K, 800-lumen standard bulbs for kitchen and bathroom
- 4-pack of 4000K, 1100-lumen standard bulbs for garage, basement, or office
- Specific shapes (BR30, candelabra) only as needed for those fixtures
Total first investment: $60–$90. Annual savings once all bulbs are swapped: $120–$200.
Frequently Asked Questions
Are LED bulbs actually worth the higher upfront cost?
Yes. Even though they cost more per bulb ($2–$5 vs. $0.50 for incandescent), they last 10–25 years and use 75–85% less electricity. Payback is measured in months, and every year after the first is pure savings.
Why do some LEDs flicker?
Usually because they're paired with an older incandescent dimmer. The dimmer doesn't modulate current in a way LEDs can use. Fix: replace the dimmer with an LED-compatible model.
Do LEDs give off heat?
They produce some heat, but far less than incandescent — an incandescent converts about 90% of its energy into heat, versus about 30% for LEDs. They're cooler to the touch and safer around fabric and insulation.
Can I use LEDs in enclosed fixtures?
Only if the packaging says so. LEDs need airflow to dissipate heat, and enclosed fixtures trap it. For fully enclosed fixtures, buy LEDs specifically rated for enclosed use.