While a super bright backlight on your BlackBerry Storm may bring out the most vibrant colors, it also drains away battery life extremely quickly. To change the backlight to a lower level simply follow the directions shown below:
1. Click Options
2. Click Keyboard/Screen
3. Click Backlight
4. Lower the Backlight even slightly from its current level (probably set at 90)
Backlit screens eat away very quickly at your battery, I actually prefer a slightly darker screen as I find it causes less strain on my eyes, give this option a try and see how well a darker screen works for you. If you don't mind wasting the battery, you can also leave the backlight on until you no longer need it.