Dutch Passion, one of the worlds oldest seedbank companies, has tested the MIGRO UVB to determine the effect on terpene levels.
They ran a controlled test in a side by side grow, one side with UVB, one without. There was a 19% increase in terpene levels under the UVB fixture, some terpenes increasing by almost 50%.
Increased terpenes mean increased flavour and smell. Research also indicates increased terpene levels can lead to a more complex and satisfying effect when consumed. Link to the full Dutch passion blog post here: How to increase terpene levels in cannabis plants