Optimizing photon dose and frequency to enhance lipid productivity of thermophilic algae for biofuel production.

•The thermophilic microalga Micractinium has a promising role in the biofuel industry.•Effects of different light regimes of the same photon dose on TAG productivity were studied.•Combination of stimuli for TAG production were applied in dense cultures.•Flashing light of 5 Hz pronounced the highest per-biomass and volumetric contents of TAG.