Quick answer
A whole-home LED conversion cuts lighting energy use by up to 75% versus incandescent and halogen — the evaluation is really about execution: which fixtures take a simple lamp swap, which dimmers need replacing to stop flicker, whether your recessed cans accept retrofit modules, and what color temperature you actually want to live with. Done as a plan instead of a drawer full of mismatched bulbs, the whole house ends up consistent, dimmable, and dramatically cheaper to light through a dark Puget Sound winter.
- LEDs use up to 75% less energy and last 15,000–25,000+ hours — through our long dark winters, the payback is real and quick.
- Flickering or buzzing LEDs are almost always an old incandescent dimmer, not bad bulbs — dimmer replacement belongs in the plan.
- Pick one color temperature per zone (2700K warm for living spaces, 3000–3500K for kitchens and baths) and buy consistent — mixed whites are the most visible DIY mistake.
- Recessed cans usually convert with IC-rated retrofit modules — no ceiling surgery — while kitchens, baths, and exteriors often justify full fixture replacement.
Use this guide when
You're renovating and want lighting decided once and correctly, your bills are creeping and half the house still runs halogen or incandescent, your existing LEDs flicker on their dimmers, or you're tired of the patchwork of color temperatures a decade of one-off bulb purchases leaves behind.
What actually drives the project
An inventory, honestly: how many fixtures are simple lamp swaps, how many recessed cans need retrofit modules, which dimmers are LED-compatible, and which rooms deserve full fixture upgrades. That inventory — not the bulb price — is the difference between a weekend errand and a lighting plan that transforms how the house feels at 4:30 pm in December.
Compare your options
Lamp (bulb) swap
Lowest cost and right for standard fixtures in good condition: replace incandescent and halogen lamps with quality LEDs in a consistent color temperature. The two things to check first are dimmer compatibility (see failure modes) and enclosed-fixture ratings — LEDs in sealed fixtures need lamps rated for the heat, or they die early and take their warranty claims with them.
Recessed can retrofit
IC-rated LED retrofit modules replace the trim and lamp in most existing cans in minutes each — sealed, efficient, better-looking light with no ceiling work. Homes with dozens of cans (most 1990s–2000s Puget Sound construction) get the biggest single win here. Where cans are damaged or non-IC in insulated ceilings, canless LED wafers are the modern replacement.
Fixture replacement and controls
Kitchens, baths, exteriors, and statement spaces often justify new integrated-LED fixtures — better optics, better looks, sealed against moisture where it matters. Pairing the conversion with LED-rated dimmers and smart switches finishes the job: scenes, schedules, and exterior lighting that handles itself through the dark months. This is also the moment to add fixtures where the house always needed them.
Key terms and context
This guide is written for electrical decisions in the Puget Sound. It uses the same terminology you'll hear from inspectors, technicians, and permit offices.
Incompatible dimmers
Legacy incandescent dimmers expect a filament's load; put LEDs on them and you get flicker, buzz, ghosting at 'off,' and shortened lamp life. The fix is straightforward — modern LED-rated dimmers matched to the load — and it belongs in the conversion plan from the start, not discovered room by room afterward.
The mixed-white patchwork
Buying LEDs one failure at a time yields a house speaking four shades of white — 2700K lamps next to harsh 5000K 'daylight' purchases. It's the most visible sign of an unplanned conversion, and it's avoided for free: choose the temperature per zone once, then buy consistently. We spec this in writing so future replacements stay matched.
Wrong lamps in enclosed and damp fixtures
Standard LEDs cooked inside sealed globes fail years early, and interior-rated lamps in exterior fixtures fail with the first wet season. Enclosed-rated and wet/damp-rated lamps exist for exactly these locations — matching the rating to the fixture is half of why professionally planned conversions actually deliver their rated lifespans.
How we build this guidance
- The plan starts with a fixture-by-fixture inventory — swaps, retrofits, and replacements each priced honestly.
- Color temperature is specified per zone in writing, so the house stays consistent for years of future replacements.
- Dimmer compatibility is verified up front — no flicker surprises after the crew leaves.
Methodology: Energy savings and lifespan figures use U.S. DOE LED comparison data — actual savings vary with usage and rates. Fixture-rating requirements (IC, enclosed, wet/damp locations) per manufacturer listings and NEC.
Last updated: 2026-07-05
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Common questions
Can my existing recessed cans be converted to LED?
Usually yes — IC-rated LED retrofit modules fit most standard cans and install in minutes each, replacing the trim and lamp with a sealed LED unit. Damaged or non-IC cans in insulated ceilings are better replaced with canless LED wafers. We confirm which you have during the walkthrough.
Why do my new LED bulbs flicker on the dimmer?
The dimmer, almost certainly. Old incandescent dimmers were designed for filament loads and control LEDs badly — flicker, buzz, and a glow at 'off' are the classic symptoms. Swapping to an LED-rated dimmer matched to the connected load fixes it; a whole-home conversion should include a dimmer inventory for exactly this reason.
What color temperature should I choose?
Per zone, decided once: 2700K (warm white) suits living rooms and bedrooms, 3000–3500K works in kitchens and baths where task visibility matters, and 4000K+ belongs in garages and workshops. The rule that prevents regret is consistency within sight lines — mixed whites in one room read as a mistake, whatever the temperatures are.
How much can a whole-home LED conversion actually save?
Lighting is a meaningful slice of household electricity, and LEDs cut that slice by up to 75% per DOE data — with our long dark winters pushing Puget Sound run-hours well above the national assumption. Add 15,000–25,000+ hour lifespans (years between ladder trips instead of months) and the conversion typically pays for itself faster here than almost anywhere.