I currently have nine bulbs, a Hue Go, and two Hue Plays set up to the same Hub. I’m not sure if there are any limits to the amount of bulbs you can link to it.
If money weren’t an issue, I’d outfit my entire home in the Hue Ecosystem. My dining room light has six candle bulbs. At the current price of $50 a pop, that’s too cost prohibitive! Would also like Hue bulbs in recessed lighting. Sigh...if only I was a millionaire (yep, millionaire not billionaire...I’m not greedy).