By Jean Mathys. Bathroom Lighting. Published at Thursday, January 11th, 2018 - 19:38:01 PM.
For effective bath lighting of any sort, it’s smart to pay attention to the CRI (color rendering index). A number of 100 is ideal but hard to find. Anything over 80 will allow people to see colors fairly accurately. Finally, don’t forget to specify the color temperature, expressed in degrees Kelvin (K). A 2,700K lamp is about the same warm yellow light as an incandescent bulb, and many clients prefer them. Jumping up to a 3,000K lamp makes a whiter light, still warm, that’s a good compromise. For residential use, 3,500K is about as cool a color as I’d recommend—it’s particularly good in closets, where you need accuracy for color matching when choosing clothing. Many clothing stores use 3,500K lighting for that reason.
Helping people see well is also critical for safety, since the bathroom is where 80 percent of older adults experience a fall. Fortunately, good lighting for seniors is good lighting for everyone. Let’s look at seven opportunities for the best bathroom illumination: daylighting, overall light, vanity lighting, lighting over a tub, light in the shower, lighting at the water closet, and night lighting.
Asymmetrical lighting is another mistake. Placing a fixture on just one side of your mirror will create uneven illumination and make grooming difficult. Lastly, clear bulbs with filaments are popular these days, but they cast a shadow on everything. Go for something opaque or frosted instead.
Since the bathroom is sometimes used in the middle of the night, it’s critical to provide some, but not too much, light by which to safely maneuver. When the eyes are adjusted to darkness, as they are when waking up from a sound sleep, very few footcandles are needed. (A full moon is just .01fc!) Flipping on bright overhead lights will be blinding and disruptive. A 5-watt nightlight may be just right.
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