Hi there! I can help you with the issue of controlling the brightness and color of your bulb in the Hubspace app. Let’s start by checking a few things together.

1. Connection: Make sure your iPhone is connected to the same Wi-Fi network that your Hubspace bulbs are using. Sometimes, a connection issue can prevent the app from communicating with the bulbs effectively.

2. App Updates: Have you checked if there’s an update available for your Hubspace app? Keeping the app updated can solve many bugs and issues. You can do this by visiting the App Store and looking for updates.

3. Restarting the app: Try closing the Hubspace app completely and then reopening it. Sometimes, this can refresh the connection and resolve control issues.

4. Power Cycle the Bulbs: If the above steps don’t resolve the issue, try turning off the bulbs for a few minutes and then turning them back on. This can help reset their connection to the Hubspace app.

5. Check Settings in App: Navigate to the settings for your specific bulb in the app. Ensure that it is still connected and that there are no specific settings that might have changed.

Let's start with these steps and see if any of them help. Please let me know how it goes!