Bright, white light can improve your mood, give you energy, make you feel more alert and less tired. This is great during the daytime but after sundown exposure to these type of lights that are similar to natural light can keep you from sleeping. One of the ways artificial light does this is by suppressing melatonin, your body’s sleep hormone. Since most people don’t go to sleep as soon as the sun sets, it’s important to use proper lighting to decrease your body’s natural response to daylight. The color of light you are exposed to at night can also affect your mood. Combined with the effects of good or poor sleep, the effect of light on mood can be significant.
Halogen bulbs give off the whitest light and are closest to daylight. They should be avoided after dark.
off blue light which can interfere with sleep. Light-emitting diode bulbs use about 75 percent less energy
than traditional bulbs but they also emit more blue light than traditional bulbs. If you use these bulbs, it's
best to turn them off at least two hours before sleep. While this may seem inconvenient there are now a
selection of smart lights that you can set to automatically shift from brighter blue light to a warmer color a
few hours before bed.
Light from a laptop or tablet is also white or bluish white white so using these devices close to bedtime or
when you wake up during the night can also inhibit sleep. Cell phones can also be a problem as, although
their light is dimmer, you use them closer to your eyes than larger screens. While computers and cell
phone activity also inhibit sleep by causing the brain to remain active, you can decrease the overall effect
on sleep in where and how you use them. Don't play highly arousing games or engage in other activities
that are challenging and require a lot of thought or that make you feel agitated or excited. If you must play
games at all, try something that you find soothing, that doesn't take a lot of concentration, attention or
effort. Switch your computer or mobile device to nighttime display, which most laptops and mobile
devices now come with, and which emit less intense light and light from longer frequencies. Also make
sure you do not use these devices in bed and ideally not in your bedroom so this area of your home will
become associated in your brain only with sleep.