illumination began from the 25th of September
2011 witha photoperiod of 16 h-light and 8 h-darkness, while inthe
PG, daily supply of supplementary LED lights from 17:00 to 23:00
began on the 1st of November and ambientlight hours from 8:00 to
17:00 during all cultivation periods. PPFD and wavelengths of LED
lights were measured with a photometer