By Tiphanie Priscilla. Bathroom Lighting. Published at Saturday, February 10th, 2018 - 19:57:06 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.
Not only are LEDs energy–saving and convenient because you don’t have to replace the bulbs for years, but they are minimal in appearance so you can get a more clean–lined, modern look in the bathroom. Plus, today’s LEDs have more wattage and the light quality is a lot warmer than before, which means you have a more cohesive look when combining them with incandescent bulbs.
How much light is needed in the bath? The answer depends on the person and the task they’re performing. For someone just waking up and shuffling in to the water closet, 10 footcandles (fc) might be plenty. After a shower, when it’s time to shave, 100fc is probably needed for better visibility.
Downlights are perhaps the worst type to use for task lighting in the bath, although they are fine for ambient or accent lighting. Also, downlights are usually incandescent, which is the least energy-efficient form of lighting-—only 10% of the energy used by a typical incandescent bulb comes out as light, the other 90% is wasted heat.
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