Instead of settling for the lights that come with your house, change them for a better lighting experience. (iStock)

A few years ago, I was at an accessibility conference where the speaker, who was blind, said: “Try turning off all the lights in this room — see who feels disabled then.” His point was that disabilities are often relative to our environments, and the tools are important in overcoming them. Lighting is a tool we have used for thousands of years, from oil lamps to wooden torches to modern electric lightbulbs.

Our first — perhaps only — desire for lighting is that it improves our visibility in darkness. This is an important priority. But humans are surprisingly adaptive: In a pitch-black room, the light of a single candle will illuminate the space for us. Our eyes adapt from darkness to something-better-than-darkness quite quickly, even if it is far from the ideal degree of visibility.

This is why we often settle for the lighting that comes with a house and, as long as there are lights in each room, we accept this lighting as “good enough.”

We settle for the ceiling pendant original to the kitchen, despite the shadows it casts on the work surface when you stand at the counter. We accept the recessed can lights in the living room despite the harsh glare when you sit on the sofa (or simply avoid the glare by using the television as a sole source of illumination as the night goes on). We choose between the ceiling fan and the recessed lights, for simultaneous use creates a headache-inducing strobe effect.

Even if there is a light in a space, it needs to be judged by its ability to safely illuminate our tasks at hand. In any given room of your home, what activities are taking place? What are the obstacles that may be in the way of that activity or of general egress and traffic flow through the room? All these elements need to be incorporated into an effective lighting design.

Perhaps most important, could you use more light? More homes suffer more from a lack of proper lighting than over-illumination. Poor lighting — especially when accented by harsh, electronic screen lighting — can cause eyestrain and other visual issues, such as fatigue. As we age, our eyes’ ability to detect contrast decreases, so proper lighting becomes especially important as our vision degrades.

Illumination through electricity — especially over the past two decades with electronic screens and the blue light they emit — has brought attention to the impact artificial lighting has on our biological clock. This clock, known as our circadian rhythm, is our natural sleep/wake cycle based on Earth’s 24-hour day/night cycle. Being exposed to blue light (such as from electronics, many LED bulbs or fluorescent bulbs) at night negatively affects this cycle and can lead to health issues. The takeaway from a residential lighting design is to incorporate soft, yellow light into any night-light paths and equally warm lighting for any night lights.

Lighting serves an imperative function, but it also plays a vital role in its form and the environment it creates. A supermarket with dingy lighting communicates seedy options and lower quality; a restaurant with fluorescent lighting vs. candlelight is a cafeteria vs. fine dining. Lighting creates and defines ambiance, and the same is true in your home.

The true demonstration of this for many homeowners happened when compact fluorescent lightbulbs (CFLs) first became available to homeowners. Fluorescent bulbs have a cooler color temperature than the warm glow of incandescent bulbs that had previously ruled the residential market.

Color temperature is gauged by Kelvin (K), and the higher the Kelvin, the cooler the color. For instance, 6000 K will be a cool, bluish white akin to a laboratory, whereas 2700 K will be a warmer, yellower light more akin to incandescent bulbs. When CFLs first became available, they were almost exclusively high in color temperature and many were low in lumens. This resulted in dim, blue light that made any room in your home feel like a derelict hospital ward (all you needed was the bad circuitry to make it flicker, and you were set). Somewhat miraculously, CFLs did manage to recover but left behind a lesson in the importance of color temperature in lighting.

Many homeowners seek a warm, inviting space for friends and family to gather; some want an area, such as a kitchen, to be designed to look fresh and clean. No client has ever painted a picture to me of their dream home as a forgotten medical facility in ruin. Ambiance, both positive and negative, lies largely in the hands of our environment’s lighting.

A fireplace aglow with a softly dancing fire creates feelings of warmth and coziness in more than the heat it generates; spotlighting on artwork or a favorite collection highlights and brings attention to something that gives you joy; a brightly lit desk creates a focused place for work or study. Designing the lighting of your home builds — and can even determine — the environment for and usage of each space for a truly “illuminating” experience.

Stephanie Brick is the owner of Stephanie Brick Design in Baltimore.