Change in the hue angle of ‘Royal Gala’ (RG), ‘Braeburn’ (BB), ‘Fuji’ (FJ), ‘Early Red One’ (ERO) and ‘Cripps’ Pink’ (CP) peel discs punched from apples harvested fromGrabouw (G) and Ceres (C) in (a) 2007−2008 and (b) 2008−2009 following irradiation at 550–650 mol m−2s−1for 72 h.