The LEDs in early production Twilight products "blink" on and off to indicate that the batteries are weak and should be replaced. Replacing your batteries should restore normal operation. (Be sure to follow all battery installation instructions provided on the specific product packaging or in this FAQ.)
However, many consumers told us that they would prefer to have the LED's slowly fade out when the batteries get weak, so their children can continue to use the Twilight product while they are obtaining new batteries. So we listened to our customers and changed the design: LEDs in current production Twilight products slowly fade out as the batteries get weaker and do not "blink." However, please note that the colors in your Twilight product could flicker or fade out at different rates, due to their differing power requirements. Installing fresh batteries should restore normal operation.