Conversation so far:
What was Jan van Eyck's maturity?
The years between 1434 and 1436 are generally considered his high point when Jan van Eyck produced extraordinary works and really matured as an artist.
What was one of Jan van Eyck's successes?
The years between 1434 and 1436 are generally considered Jan van Eyck high point when he produced works including Lucca Madonna and Virgin.
What was special about Jan van Eck's successful paintings?
The interior has complex light sources, typical of Jan van Eyck, with light coming both from a variety of angles.

Question: What was another success?
Self-contained rewrite: What was another successful painting Jan van Eyck is known for besides Lucca Madonna and Virgin?