Purchasers of the Philips Hue "smart" ambient lighting system are finding out that the new firmware pushed out by the manufacturer has cut off access to previously-supported lightbulbs.
"While the Philips Hue system is based on open technologies we are not able to ensure all products from other brands are tested and fully interoperable with all of our software updates. For guaranteed compatibility you need to use Philips Hue or certified Friends of Hue products"