俱舍論記 11.111

11.111

「持雙以上至依何得成」者，問。「依華開合至天壽短長」者，答。花開為晝，花合為夜。𤘽物陀，此云白蓮花。鉢特摩，此云紅蓮花。鳥鳴為晝，鳥靜為夜。天寤為晝，天寐為夜。自身帶光明，成外光明事，不假外光。

Regarding "Above the Yugandhara […] on what is it established?": this is the question. Regarding "Relying on the opening and closing of flowers […] the brevity and length of celestial lifespans": this is the answer. Flowers opening is day; flowers closing is night. Kumuda is translated here as white lotus. Padma is translated here as red lotus. Birds singing is day; birds being quiet is night. Celestial beings waking is day; celestial beings sleeping is night. Their own bodies possess radiance, accomplishing external luminous functions without relying on external light.