他是唯一的光芒
[tā shì wéi yī de guāng máng]
'他是唯一的光芒' translates to 'He is the only light.' This nickname signifies that the mentioned 'he' is the sole source of positivity, guidance, or love in someone's life, much like how sunlight shines upon all but can feel singular in its warmth and significance for one individual.