while reading message
If you are reading or sending messages on the received smartphone, then try that it is very important to have about 50 percent brightness during this time. Actually, proper lighting is needed to read and send messages, it does not put pressure on your eyes and you can easily do texting.
If you are playing a game, then try that the brightness should be between 40 percent to 50 percent during this time. Actually, if the brightness is increased during gaming, then it will put more pressure on the eyes because while playing the game, many different moving objects have to be seen as well as many vibrant colors are also exposed, so the brightness should remain medium.
While using the smartphone in the outdoors
When you are in outdoor and using your smartphone, then you should set the brightness of smart phone to full because outdoor brightness is required especially for smartphones with non amoled display. However, if your smartphone is an AMOLED display, then you can keep the brightness up to 80 percent. These tips are very important.