Dreams about past relationships can often reflect unresolved feelings or insights about personal growth. In your dream, the card from your ex-boyfriend carrying a message about candles and illumination suggests a few potential interpretations:

1. Reflection on Relationships: The imagery of candles could symbolize the impact that people have on each other’s lives. Your ex might represent a significant influence, and the dream may be prompting you to reflect on what you learned from that relationship.
2. Healing and Closure: The notion that some candles go out while others light us up again could indicate a healing process. It may suggest that while this relationship has ended, it served a purpose in your life, and that you are now open to new connections that will bring joy and light.
3. Personal Growth: The dream may also signify your journey of self-discovery and the importance of recognizing the lessons learned from past relationships. It invites you to consider how you’ve grown since the relationship ended and how new experiences may continue to shape you.
4. Connection and Support: This message about sharing illumination may also reflect a desire for connection and support in your current life. It could be a reminder of the importance of surrounding yourself with positive influences.

Overall, this dream encourages you to embrace the lessons from your past relationships while remaining open to new experiences that can enrich your life. Consider what "candle" you might need to ignite within yourself or what kind of connections you wish to foster moving forward.