How can you add natural light to a basement or windowless room

6 min read  |  Last reviewed October 29, 2026

Dark basements and interior rooms feel smaller and get used less. You can improve them in stages, starting with low-cost changes and moving to a daylighting system if you want real daylight.

Simple changes that make a dark room feel brighter

Bright finishes and clear sight lines help any light source go further, whether it is daylight or an electric lamp.

• Use mirrors. Place them opposite a light source so they bounce light deeper into the room ^[3].
• Choose light colors. Light walls, ceilings and flooring reflect more light than dark ones ^[4].
• Declutter. Keep furniture light and low, and clear the floor, so nothing blocks light as it moves through the space ^[3][4].
• Soften window coverings. If the room has small windows, use sheer or light-filtering coverings that keep privacy while letting light in.

Natural light can transform a dark basement.

Can a tubular skylight bring daylight into a basement?

Often, yes, if the room has a workable path to the roof. A tubular skylight collects daylight in a roof dome, carries it down a reflective tube, and spreads it into the room through a ceiling fixture ^[5]. Because the light travels through a tube instead of a window, the room does not need an exterior wall.

The U.S. Department of Energy describes daylighting, the use of windows or skylights for natural light, as a strategy that can save money for homeowners ^[1], and it notes that natural light can reduce reliance on artificial lighting ^[2]. Solatube describes its kit as delivering natural light without the heat ^[5]. Results vary with your home, roof and room.

The basement catch: the path to the roof

A basement sits below other floors, so the tube may have to pass through the floors and the attic above it to reach the roof. That works best on a straight or gently angled route with no ducts, wiring, plumbing or structural framing in the way. Extension tubes add length, and the instruction manual explains the limits ^[5][6]. If the path is not obvious, have a professional assess it before you buy.

Which kit fits which basement room?

Solatube’s shop sorts its kits by the rooms they serve. Two cover most basement needs.

Garages are another larger space the 290 DS kit is listed for.

Five things to check before you buy

1. Locate the room. Use a floor plan or walk the attic to see what sits above the room.
2. Trace the path. Look for ducts, wiring, plumbing and framing between the room’s ceiling and the roof.
3. Know your roof. Shingle, tile, metal and flat roofs each need the right flashing, and the shop lists dedicated kits for some roof types and for hurricane zones.
4. Estimate your tube length. Some kits include extension tubes and others do not. Compare the length you need with what the kit includes ^[5][6].
5. Decide who installs it. Solatube sells these as DIY kits with an instruction manual, or you can use Certified Installation.

Frequently asked questions

Can a skylight work in a basement?

It can, if the tube has a workable path from the roof to the room. Check that path first, because it decides whether a tubular skylight is a good fit.

Do I need extension tubes?

It depends on the distance between the room’s ceiling and the roof. Some kits include extension tubes and others do not, so compare the listing and the instruction manual ^[5][6].

Will the room stay bright at night?

A tubular skylight delivers daylight, so it works while there is daylight. Keep your regular lighting for evenings.

Can I install it myself?

Solatube sells its kits as DIY kits with an instruction manual ^[5][6]. If the path crosses several floors or the roof is steep or high, hire a professional.