Hi Moruff,

Yes, here is a book chapter that describe several methodologies to measure light interception: https://www.sciencedirect.com/science/article/pii/B9780080319995500145

I have used a line photon sensors in sweet cherry trees, which measures the photosynthetic active radiation (PAR). Then you can estimate the leaf area of your crop and calculate how much radiation per leaf area was intercepted.

I hope this will help you!