In view of radiant uniformity of the green wall, the grow lights were placed in two rows. 4 units of 90° ○3 beam angle grow lights were installed 2 meters away from the green wall in the ceiling. 4 units of 25° ○1, and 3 units of 60° ○2,were intermittently installed 2.5 meters away from the green wall in the ceiling (see the layout plan on left). The photon-base of G110 grow lights is 68 PAR watts or 310 µmol/s luminous efficacy. The average irradiant of 1200 lux with uniformity of 0.355.