Roof lights is one search term that points at four different products, and the one you need depends on whether you want daylight, curb appeal, holiday decoration, or off-road visibility. In building terms a roof light (also written rooflight) is a glazed opening that brings daylight through the roof, the same product most Americans call a skylight. The other three uses are permanent architectural LED trim on the eaves, seasonal Christmas string lights along the roofline, and the light bars mounted on a truck cab. This guide sorts out which one you mean, then goes deep on the two that involve your actual roof.
What does “roof lights” mean?
“Roof lights” refers to four separate products that share the phrase but solve different problems. Two of them are part of the roof itself: glazing that admits daylight, and lighting fixtures attached to the roofline. The other two are seasonal decoration and vehicle equipment. Match your intent to the row below before you shop, because the products, installers, and price ranges do not overlap.
| What you mean | Common names | What it does | Typical price |
|---|---|---|---|
| Glazing in the roof | Rooflight, skylight, roof window, sun tunnel, roof lantern | Brings natural daylight into a room from above | $150 to $5,000+ per unit installed |
| Permanent roofline lighting | Permanent LED, architectural lighting, eave lighting | Year-round programmable accent and security lighting on the eaves | $1,800 to $4,500 installed |
| Seasonal roof lights | Christmas lights, holiday string lights, C9 bulbs | Temporary decoration clipped to the roofline | $50 to $400 in materials |
| Vehicle roof lights | Cab lights, roof light bar, marker lights | Forward visibility and marker signaling on a truck or off-road rig | $30 to $400 for the fixture |
Rooflights and skylights: glazing that brings in daylight
A rooflight is a glazed unit set into the roof to bring daylight into the space below, and in North American usage the words rooflight and skylight mean the same thing. VELUX, the largest manufacturer, labels its products skylights and roof windows. The subtle distinction some builders draw is that a rooflight sits low and close to the roof plane on a flat or low-slope roof, while a roof window is a taller, often opening unit set into a pitched roof. Function is identical: controlled daylight from above.
Types of roof light (skylight)
Roof lights split into five product types by how they open, mount, and channel light. Fixed and vented units are the common pitched-roof choices, tubular units suit small interior rooms with no direct roof access, and lanterns and polycarbonate sheets serve flat roofs and outbuildings. Pick by the room, the roof slope, and whether you need ventilation.
- Fixed skylight: a sealed glazed unit that does not open. It leaks the least of any type because there are no moving seals, and it is the cheapest glass option.
- Vented (opening) skylight: opens by manual crank, electric motor, or solar actuator to release heat and moisture. Best over kitchens and bathrooms.
- Tubular skylight (sun tunnel): a small reflective tube that pipes daylight from a rooftop dome into a hallway, closet, or windowless bath.
- Roof lantern: a raised, multi-pane glazed structure, often pyramid-shaped, set on a flat roof or extension to flood a room with light.
- Polycarbonate rooflight sheet: a translucent corrugated or box-profile panel used on sheds, carports, and agricultural roofs where diffuse light matters more than a view.
What roof lights (skylights) cost
A skylight-style roof light costs from about $150 for a fixed unit alone up to $5,000 or more installed for a large opening or a glazed lantern. Labor drives most of the total because the crew has to cut the deck, flash the curb, and tie the opening into the roof covering. Metal and tile roofs cost more to cut than asphalt shingles. The ranges below reflect 2026 pricing.
| Type | Unit only | Installed | Best for |
|---|---|---|---|
| Fixed skylight | $150 to $800 | $1,000 to $2,500 | Adding light with the lowest leak risk |
| Vented / electric skylight | $300 to $2,000 | $1,600 to $4,700 | Kitchens, baths, heat and moisture release |
| Tubular skylight | $150 to $500 | $500 to $1,000 | Small rooms with no direct roof access |
| Roof lantern | $1,000 to $3,500 | $1,500 to $5,000+ | Flat-roof extensions and open-plan rooms |
| Polycarbonate sheet | $2 to $6 per sq ft | DIY to $12 per sq ft | Sheds, carports, agricultural roofs |
Shades and blinds add roughly $250 to $500 per unit and cut summer heat gain. For the full breakdown see our guide to how much skylights cost, the models and glazing tiers in the VELUX rooflight lineup, and where the glass pays off in energy efficient skylights. For translucent panels on an outbuilding, compare polycarbonate roofing sheets.
Permanent roofline lighting: architectural LED on the eaves
Permanent roofline lighting is a track of programmable LED points installed under the eaves and along the roofline, left up year-round and controlled by an app. Brands like JellyFish Lighting, Gemstone Lights, and Trimlight run color-changing diodes inside a channel that reads as trim in daylight. A typical installed system runs $1,800 to $4,500 for an average single-story home, roughly $17 to $32 per linear foot of covered roofline.
Owners choose it to replace both holiday lights and separate security floods with one system. The diodes point down at the wall and yard rather than up, so the effect is accent and safety lighting, not uplighting on the roof surface. Installation ties into a low-voltage transformer and an exterior outlet, and the channel screws to the fascia or soffit, which means the fascia has to be sound. If yours is rotted or loose, address that first.
Christmas and seasonal roof lights
Seasonal roof lights are temporary string lights clipped to the roofline for the holidays and taken down after. C9 LED bulbs are the standard for outlining a roof edge because they are large, bright, and draw little power. Budget $50 to $400 in bulbs and clips for a typical home, with the run of the roofline and the bulb count setting the total.
Clip the strings to the shingle edge or the gutter lip with dedicated all-in-one clips, never staples or nails through the roof covering, which create leak points. If you run gutter guards, hang the lights without lifting the guard using the method in our guide to hanging Christmas lights with gutter guards. Work from a stable ladder or the ground with a pole, and keep all connections rated for outdoor use.
Vehicle and cab roof lights
Vehicle roof lights are the light bars and cab marker lights mounted on the top of a truck or off-road rig, and they have nothing to do with a building roof. Cab marker light kits run about $30 to $150 and come in clear, smoked, or amber lenses. Roof-mounted LED light bars for spot, flood, or combo beams run about $50 to $400 depending on length and output. If this is what you were after, an automotive parts retailer, not a roofer, is the right source.
How to choose the right roof light
Choosing the right roof light comes down to the outcome you want. Work through the questions below in order and you land on one product category with no overlap. Only the first two involve a roofing contractor.
- Do you want daylight inside a room? You need a rooflight or skylight. Pick fixed for the lowest leak risk, vented for a kitchen or bath, or tubular for a small windowless space.
- Do you want year-round lighting on the house exterior? You want a permanent roofline LED system installed on sound fascia or soffit.
- Do you only want lights up for the holidays? Buy C9 LED strings and clip-on hangers, no permanent hardware.
- Are you outfitting a truck or off-road vehicle? You want cab marker lights or a roof light bar from an automotive supplier.
Cost comparison across roof light types
The four roof light categories span from about $50 for a set of holiday strings to $5,000 or more for a glazed lantern. The table below puts every option side by side so you can match budget to intent in one view. Installed prices assume professional labor except where DIY is standard.
| Roof light type | Typical total | Who installs it | Permanent? |
|---|---|---|---|
| Tubular skylight | $500 to $1,000 | Roofer or skylight installer | Yes |
| Fixed skylight | $1,000 to $2,500 | Roofer or skylight installer | Yes |
| Vented skylight | $1,600 to $4,700 | Roofer or skylight installer | Yes |
| Roof lantern | $1,500 to $5,000+ | Specialist installer | Yes |
| Permanent roofline LED | $1,800 to $4,500 | Lighting contractor | Yes |
| Seasonal C9 string lights | $50 to $400 | DIY | No |
| Vehicle cab / bar lights | $30 to $400 | DIY or auto shop | Fixture only |
Frequently asked questions
Are roof lights the same as skylights?
In North American usage, roof lights and skylights are the same product: a glazed unit set into the roof to bring in daylight. VELUX and other manufacturers label them skylights or roof windows. Some builders reserve rooflight for a low-profile unit on a flat or low-slope roof and skylight or roof window for an opening unit on a pitched roof, but the function is identical.
What are the lights on top of a roof called?
Lighting fixtures on the roofline have two names depending on permanence. Year-round programmable fixtures under the eaves are called permanent roofline lighting or architectural LED lighting, from brands like JellyFish and Trimlight. Temporary holiday strings clipped to the edge are seasonal or Christmas roof lights, usually C9 LED bulbs.
How much do roof lights cost?
It depends on which type you mean. A fixed skylight runs about $1,000 to $2,500 installed, a vented skylight $1,600 to $4,700, and a tubular unit $500 to $1,000. A permanent roofline LED system costs $1,800 to $4,500 installed. Seasonal string lights cost $50 to $400 in materials, and vehicle roof lights run $30 to $400 for the fixture.
Do roof lights leak?
Glazed roof lights can leak if they are poorly flashed or the seals fail, but a correctly installed and flashed unit should not. Fixed skylights leak least because they have no moving seals. Roofline lighting and holiday lights do not leak on their own, but fastening them with nails or staples through the roof covering creates leak points, so use clips rated for the edge or gutter.
What is the difference between a rooflight and a roof lantern?
A rooflight is a single flat or low-profile glazed panel set into the roof plane, while a roof lantern is a raised, multi-pane structure, often pyramid or ridge shaped, that sits above the roof line. Lanterns admit more light and add architectural height, typically over flat-roof extensions, and cost more, generally $1,500 to $5,000 or more installed versus $1,000 to $2,500 for a fixed rooflight.
Can you install roof lights yourself?
Seasonal string lights and vehicle lights are standard DIY projects. Glazed skylights and rooflights are not, in most cases, because cutting the deck and flashing the curb correctly is what keeps the roof watertight, and a poor cut voids many roofing warranties. Tubular units are the most DIY-friendly glazing option, but any unit that penetrates the roof deck is safer with a roofer.
Reviewed by The Roofing Brief Team. Last reviewed July 2026.