Bright

明るい

akarui

(emitting much light; visually dazzling — see also luminous, radiant)

聡明

sōmei

(having a clear, quick intellect — see also intelligent)

賢い

kashikoi

(having a clear, quick intellect — see also intelligent)

鮮明

senmei

(of a colour: not muted or pale — see also bold, vivid)