Alongside this, the user can also test the LED light within the device to make sure it is fully operational. (ccinews.net)
In fact, my doctor routinely recommends that his patients get 30 minutes of sunlight or bright light within an hour of waking when they are working to balance hormones. (wellnessmama.com)
When these telescopes see light within the next few years, the result will be dramatic. (discovermagazine.com)