This quiz was harder than I thought…
First question: 164 out of 212 voted correctly that in a horticultural industry, PAR (short for Photosynthetically active radiation) is the go-to unit (or term) to measure.
Second question: 106 out of 211 voted correctly that DLI (short for Daily light integral) is the calculation that takes days into account.
For more reading about the subject I’d recommend to study great topic from @Northern_Loki - Lighting Spectral Data.