Time series of changes in light energy transfer efficiency (ETE) in <i>P. tricornutum</i> during low white light (35 µmol m⁻² s⁻¹) and subsequent exposure to 24 and 48 h of high white light (500 µmol m⁻² s⁻¹).

<p>The 24 and 48 h HL spectra were scaled to the LL Chl <i>a</i>-fluorescence maximum at 675 nm for comparison.