Outdoor Recessed Lighting: Complete Guide

Done right, outdoor recessed lighting disappears into the ceiling and lets the light do the talking—no glaring fixtures, just clean pools of light on your steps, siding, and patio. Done wrong, you get water in the housing, tripped breakers, and cans that fog up after the first hard rain. This guide walks the whole job the way I’d tackle it on a real house, from picking a housing that survives weather to wiring it on a GFCI-protected circuit.

Where Outdoor Recessed Lights Actually Work

Recessed cans live in a ceiling, so you need a ceiling or a horizontal soffit to put them in. On most homes that means covered porches, entry overhangs, eaves, and the underside of second-floor decks. You can also run them down a soffit to wash a wall or line a walkway from above.

• Porch and entry ceilings — general lighting over the door, usually one 6″ can per 25-30 square feet.
• Soffits and eaves — aimed down the face of the house for wall wash, or straight down to graze landscaping.
• Covered patios and outdoor kitchens — task light over grills and prep counters, plus ambient fill.
• Deck undersides — lighting a lower patio from the deck framing above.

What they don’t do well is sit out in open weather with rain hitting the trim. There’s a rated fixture for that, and it comes down to location listing, which is the single most important spec on the box.

Wet-Location vs Damp-Location: Read the UL Listing

Every exterior fixture carries a UL location listing, and getting this wrong is how water ends up in your ceiling. Two ratings matter here.

• Damp-location listed — for spots protected from direct rain and splashing but still exposed to humidity and condensation. A recessed can tucked up in a covered porch ceiling, well back under the overhang, can be damp-rated.
• Wet-location listed — for anywhere rain, snow, or sprinkler spray can reach the fixture directly, including the outer edge of a soffit or an open eave. When in doubt, buy wet-rated. It costs a few dollars more and it seals against standing water.

My rule on job sites: if I can’t guarantee the trim stays bone dry in a driving rain, I spec a wet-location gasketed trim. A wet-rated LED downlight runs roughly $18-$45 per unit; damp-rated retrofit modules start around $12-$20. Never install an interior-only can outdoors—the housing isn’t sealed and the paint isn’t rated for UV.

IC-Rated vs Non-IC Housings

If the can sits in a soffit or ceiling cavity that touches insulation—and most exterior overhangs on a conditioned house do—you need an IC-rated housing. IC stands for “insulation contact,” meaning the fixture is built to sit buried in insulation without overheating and becoming a fire hazard.

Non-IC housings require a 3″ air gap from any insulation, which is nearly impossible to maintain in a tight soffit. When you’re buying outdoor recessed lighting for an eave or porch ceiling that’s part of the building envelope, choose IC-rated, airtight housings. The airtight rating also stops warm indoor air from leaking out and condensing inside the cold can—the usual reason exterior cans fog.

Sizing, Lumens, and Color Temperature

Can diameter drives the look. A 6″ can throws a wider, softer pool and suits general porch lighting; a 4″ can gives a tighter, more architectural beam that’s great for soffit accents and wall grazing. Newer canless LED disc lights come in 4″ and 6″ too and install in shallow cavities where a full housing won’t fit.

• Lumens — 600-800 lumens per light for general porch and entry lighting; 400-600 for accent and wall wash. A covered patio kitchen wants 800-1,000 lumens over the work zone.
• Color temperature — 2700K reads warm and residential, best for entries and porches. 3000K is a clean neutral-warm that flatters brick and stone. Skip 4000K-5000K outdoors unless you specifically want that cool, security-light feel; it makes wood and skin tones look harsh.
• Beam angle — 40°-60° for general downlight; a narrow 25°-35° beam for accenting a column or grazing a stone wall.
• CRI — aim for 90+ so your siding, plants, and stonework show true color.

Space general cans 4-6 feet apart on a porch ceiling, and pull the first one about 2 feet off the wall so you light the wall face, not just the floor.

Wiring It Safely: Breaker, Tester, and GFCI

This is line-voltage work, and the exterior circuit adds a water hazard on top of the shock hazard. Treat it seriously.

1. Kill the breaker. Switch off the breaker feeding the circuit at the panel and put a piece of tape over it so nobody flips it back.
2. Verify it’s dead. Before you touch a single wire, confirm the circuit is de-energized with a non-contact voltage tester, then re-test on a known live outlet to prove your tester works.
3. GFCI protection is required. Under NEC 210.8, outdoor lighting outlets generally must be GFCI-protected. You get that from a GFCI breaker in the panel or a GFCI device upstream on the circuit. Wet locations plus line voltage make this non-negotiable.
4. Use the right cable and boxes. Exterior runs need weather-appropriate wiring methods, and any junction box exposed to weather must be listed for wet locations with proper gaskets and fittings.
5. Seal every penetration. Caulk around trims and use the fixture’s gasket so water can’t wick into the ceiling cavity.

Match conductor size to the breaker—14 AWG on a 15 Amp circuit, 12 AWG on a 20 Amp circuit—and don’t overload the run. LED cans draw very little, so a single 15 Amp circuit can carry a lot of them, but tally the wattage before you add fixtures to an existing circuit.

Step-by-Step: Retrofitting Cans Into a Soffit

1. Map your layout on the ceiling and check above for framing, wiring, and plumbing before you cut.
2. Use the trim template to mark each hole, then cut with a hole saw sized to the housing (typically 4″ or 6″).
3. Run cable from a switch location to the first can, then daisy-chain between fixtures, leaving service loops.
4. Make up connections inside the fixture’s integral J-box, grounding every housing.
5. Clip remodel housings into the ceiling with their spring tabs, or screw new-construction cans to framing.
6. Install wet- or damp-rated trims, seat the gaskets, and caulk the perimeter.
7. Restore power and test each light, then confirm the GFCI trips and resets.

When to Call a Licensed Electrician

Swapping a like-for-like trim or retrofit module in an existing rated housing is reasonable DIY. Anything that adds a new circuit, ties into your panel, runs new cable through walls, or requires a GFCI breaker crosses into work most jurisdictions want a licensed electrician and a permit for. If you’re extending a circuit outdoors, adding fixtures to a soffit with no existing wiring, or you’re at all unsure whether your circuit is properly grounded and GFCI-protected, hire a pro. The cost of an electrician is far less than a fire, a failed inspection, or water damage from a leaking, unrated can.

Controls, Dimmers, and Smart Options

How you switch outdoor cans matters as much as the fixtures. A few setups I use regularly:

• Photocell (dusk-to-dawn) — turns the lights on at dark and off at daylight automatically, great for entries and security-oriented soffit lighting.
• Astronomic timer or smart switch — follows sunrise and sunset by date, so you’re not adjusting a mechanical timer four times a year.
• Dimmer — lets you drop porch and patio lighting to a soft glow for evenings; pair it with an LED-rated dimmer on the manufacturer’s compatibility list to avoid flicker and buzz.
• Motion sensor — useful on side yards and back eaves where you only want light when someone’s there.

Keep any control device rated for its location too—an outdoor-mounted switch or sensor needs a weatherproof, in-use (“bubble”) cover and a wet-location listing. Most homeowners put the switch just inside the door, which keeps a standard interior device dry and code-simple.

Maintenance and Common Problems

• Fogging inside the lens — almost always an air leak from a non-airtight can or a failed gasket. Swap to an airtight IC housing and re-seal.
• Corroded trim screws — coastal and humid climates eat cheap hardware; buy fixtures with corrosion-resistant trims.
• Flickering LEDs — usually a dimmer incompatibility; pair LED cans with a dimmer on the manufacturer’s compatibility list.
• Nuisance GFCI trips — moisture in a fixture or box; find and dry the wet fixture rather than removing the protection.

Get the location listing, IC rating, and GFCI right, and outdoor recessed lighting will run for a decade of LED life with almost no attention. Cut corners on any of those three, and you’ll be back in the ceiling before next spring.