Conversation so far:
What is the name of Renaissance's hit single?
They are best known for their 1978 UK top 10 hit Northern Lights
How did Northern Lights do in the charts?
Northern Lights entered the UK singles charts on 15 July 1978 and remained there for 11 weeks, peaking at No. 10

Question: What label were they with when it was produced?
Self-contained rewrite: What label were Renaissance with when it was produced?