What does adding recessed lighting involve?

Adding recessed lighting is a wiring job with a ceiling job attached. A licensed electrician plans the layout, picks fixtures rated for what is above your ceiling, runs new cable to a switch or dimmer, cuts the openings and fits the lights. How big the job is depends mostly on one thing: whether there is overhead lighting and wiring there already.

Three kinds of recessed lighting job

Upgrading cans you already have. Retrofit kits replace the old bulb and trim of an existing can with an LED light that screws into the existing socket, without replacing or modifying the fixture inside the ceiling.^[1] This is the smallest job, because no wiring changes.

Replacing a ceiling light with recessed lights. Where a surface fixture, track or pendant is today, there is already a box and a switched cable. The electrician takes that fixture down and feeds one or more recessed lights from it. Adding several lights from one existing feed usually means new cable between them.

Adding lights where there are none. If you have no overhead lighting today, new wiring has to be added to connect the fixtures to your home's electrical panel, which ENERGY STAR calls generally a job for an electrician.^[1] That means a new circuit or a tap on an existing one, cable through the ceiling, and a new switch location. It is the largest of the three and usually needs a permit.

Choosing the fixtures

Most of the decisions that matter are made before anyone cuts a hole.

Can or canless. Traditional recessed lights hang a metal housing between the joists. Canless kits do away with the traditional housing, so they fit through a small ceiling opening.^[1] They are a common choice in finished ceilings, where access from above is limited.

Insulation. If insulation will touch the fixture, it must be rated Type IC (insulation contact).^[2] Fixtures that are not IC-rated usually need at least 3 inches of clearance to the nearest insulation to keep a proper operating temperature.^[2] Under an unconditioned attic, ENERGY STAR suggests fixtures rated Type AT (airtight), which keep the air you paid to heat or cool from escaping into the attic.^[2] In a top-floor ceiling in Virginia, that usually means asking for IC and AT together.

Moisture. A fixture above a shower or outdoors should be damp or wet rated.^[1] Bathrooms, covered porches and soffits all count.

Brightness and colour. ENERGY STAR sets a floor: certified downlights must give at least 345 lumens for openings of 4.5 inches or less and 575 lumens for larger ones.^[3] Colour is a matter of taste. Lower kelvin numbers look warmer and more yellow; ENERGY STAR lists 2200 to 3000K as matching incandescent bulbs, 3500 to 4100K for whiter light, and 5000 to 6500K for bluer white light.^[2] Many kits let you pick the colour with a switch on the fixture, which helps if you are unsure.

Dimming. Not every LED light works well with every dimmer switch.^[2] ENERGY STAR's rule is that certified downlights marketed as dimmable must dim continuously from 100% to at least 20% of their light output,^[3] and their packaging lists compatible dimmers. Choose the lights and the dimmer together, and ask the electrician to confirm the pair is on the manufacturer's list. Our answer on why LED bulbs flicker on a dimmer explains what happens when they are mismatched.

What the electrician does on the day

On a typical job, the electrician marks the layout on the ceiling, checks where the joists, ducts and plumbing run, and confirms the circuit has room for the new load. Openings are cut to the size the fixture maker specifies, cable is fished between the openings and to the switch, each fixture is connected in its junction box and secured to the ceiling, and the dimmer or switch is fitted. Where there is a permit, Virginia's code lists an inspection of electrical systems prior to concealment and a final inspection among the minimum inspections,^[5] so the building official may need to see the wiring before the ceiling is patched.

Expect some dust and some ceiling repair. Patching around old fixture boxes and painting are often priced separately, so ask whether they are included.

Permits

Virginia's building code says a permit is required before work starts on installations or alterations involving electric wiring.^[4] There is a short list of ordinary repairs that are exempt: replacing existing luminaires (lighting fixtures) and dimmer and control switches needs no permit application in Groups R-3, R-4 and R-5, and in Group R-2 where serving a single dwelling unit.^[4] A like-for-like swap fits that list. Adding new lights on new cable is an alteration and does not, and that exemption does not excuse the work from the code's other requirements.^[4]

When you hire, the permit is the contractor's job. The Board for Contractors puts it plainly: "The contractor should apply for and obtain any necessary building permits."^[8]

Who may do it

In Virginia, a tradesman is any individual who engages in, or offers to engage in, electrical, plumbing or HVAC work for the general public for compensation,^[6] and no individual may engage in, or offer to engage in, work as a tradesman unless licensed.^[7] On a crew, someone working under the supervision of a tradesman licensed in that specialty does not need their own licence.^[7] A handyman cutting in recessed lights for pay needs an electrical licence or a licensed electrician supervising. Owners working on their own home have a narrower path; see whether a homeowner can do their own electrical work in Virginia.

When to call a licensed pro

Call a licensed electrician for any recessed lighting that adds wiring, and before buying fixtures if:

• There is no overhead light or switch where you want the lights.
• The ceiling sits under an attic with insulation, or under finished space with no access from above.
• You want the lights on a dimmer, a smart control or more than one switch.
• The existing lights flicker, buzz, or the trims feel hot, or you see scorch marks or discoloured wiring.
• Your home has older wiring, or the panel has no spare space.

Ask for the job in writing with the fixture model, the number of lights, the dimmer, whether a permit is included and who patches the ceiling. The Board's checklist starts simply: "Get at least three written bids."^[8] Our answer on what recessed lighting costs in Virginia lists what a full quote should cover, and you can check an electrician's licence before you sign.

Find an electrician

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