ぴかぴか光る[pikapikahikaru] to sparkle
旭光[kyokkou] rays of the rising sun
威光[ikou] power
稲光[inabikari] (flash of) lightning
曳光弾[eikoudan] tracer bullet

栄光[eikou] glory
円光[enkou] halo
炎光[enkou] flame
黄道光[koudoukou] zodiacal light
可視光線[kashikousen] visible ray

蘚苔[sentai] moss
光蘚[hikarigoke] luminous moss
蘚苔学[sentaigaku] bryology
蘚苔植物[sentaishokubutsu] bryophyte (any of three groups of non-vascular land plants, inc. mosses, hornworts and liverworts)

水蘚[mizugoke] sphagnum
蘚類[senrui] mosses (non-vascular plants of class Bryopsida)
高野の万年蘚[kouyanomannengoke] Climacium japonicum (species of moss)