There’s probably something to be said about LED shower heads or light therapy in general, especially when you have just woken up. This LED Color Changing Shower Head is from Chinavasion and the colors will change depending on the temperature of the water, making it easy to figure out if the water is going to scald you or freeze you.
Temperatures below 90°F make it turn green, temps between 91 and 105°F it becomes blue and 107 to 113°F will make it red. If it gets above 114°F, the shower head will start to flash, alerting you to the danger of potentially scalding yourself. These shower heads don’t require any batteries. There is an internal generator powered by the flow of water to charge it up.
You can get one for just $13 a pop here. That’s not a bad price for something like this.