To resolve the Bluetooth connectivity issue you're experiencing with your Hubspace app and newly installed exterior light, follow these steps:

1. Ensure Bluetooth is Enabled

Make sure that Bluetooth is turned on in your iPhone settings. To do this:

- Open the Settings app on your iPhone.
- Tap on Bluetooth.
- Ensure the Bluetooth toggle is set to the On position.

2. Close Other Apps

If there are any other location-based or Bluetooth applications open, they might interfere with the Hubspace app. Close all other apps running in the background.

3. Restart the Hubspace App

Sometimes restarting the app can resolve temporary glitches:

- Double-tap the Home button (or swipe up from the bottom of the screen if using a model without a home button) to see your recent apps.
- Swipe up on the Hubspace app to close it.
- Reopen the Hubspace app.

4. Check Wi-Fi Network & Compatibility

Ensure your iPhone is connected to a 2.4GHz Wi-Fi network, as Hubspace often requires it for proper connectivity. To check:

- Open the Settings app.
- Tap on Wi-Fi, and confirm you are connected to a 2.4GHz network.

5. Reset the Exterior Light

Sometimes resetting the device can help in establishing a connection. Consult the installation manual for specific instructions to reset your exterior light. This usually involves a combination of turning it off and on.

6. Clear App Cache

Deleting and reinstalling the Hubspace app can clear any cache that might be causing issues:

- Uninstall the Hubspace app by pressing and holding its icon and selecting Remove App.
- Download the Hubspace app again from the App Store.

7. Update the Hubspace App and iOS

Ensure that both your Hubspace app and iOS are up to date:

- Go to the App Store, tap on your profile picture, and scroll to see if an update for Hubspace is available.
- For iOS updates, go to Settings > General > Software Update.

8. Move Closer to the Device

If possible, get closer to the exterior light while trying to connect. Bluetooth signals can weaken with distance or physical obstructions.

9. Follow App Instructions Carefully

Ensure you are following the prompts in the Hubspace app correctly during the installation process. Sometimes a simple oversight can lead to a missed connection.

10. Consult Troubleshooting Guide

Refer to the Hubspace troubleshooting guide for more detailed instructions on resolving Bluetooth issues. Here’s a helpful resource: Troubleshooting Guide.

If these steps do not resolve your issue, it may be useful to reach out to Hubspace customer support or check community forums where other users have shared their solutions regarding similar problems - learn more - learn more.