SKylight not an option? Try a SUn Tunnel
Sun tunnels, often referred to as “tubular skylights”, offer a unique option for bringing daylight into spaces that would not be suited for a skylight or a vertical window. Such as an interior bathroom or walk-in closet.
Sun tunnels have a nice interior look, akin to a recessed light, with many optional accessories such as a solar nightlight, and multiple diffuser options.
If you have a dark hallway, or closet on the second floor a new sun tunnel installation could be the perfect cost effective option for bringing more light to your life.