Safer when lit up with 安全

結衣(ゆい):

「あ　私(わたし)のピカピカもう電池(でんち)切(き)れちゃった」

“Ah, my sparkler's battery has already run out.”

母(かあ)さん:

「あらま　光(ひか)ってる方(ほう)が安全(あんぜん)でいいのに」

“Oh dear, it's safer and better when it's lit up.”

Key Points

1. 安全(あんぜん) = “safe” in a practical nighttime sense

   • Here, 安全(あんぜん) means being safer because the girls are easier to see in the dark.

2. 光(ひか)ってる = casual spoken form of 光(ひか)っている

   • 光(ひか)ってる is a common contraction of 光(ひか)っている, meaning “is glowing”.

   • Recognizing this contraction helps you parse the line quickly in natural dialogue.

3. 光(ひか)ってる方(ほう)が = “the glowing state is the better option”

   • 方(ほう) is used when comparing alternatives, so 光(ひか)ってる方(ほう)が means “the lit-up one” or more naturally “when it’s lit up”.

   • The unstated comparison is with not glowing anymore, since Yui just said the battery ran out.

4. 安全(あんぜん)でいい = “safer and better”

   • The sentence links 安全(あんぜん) and いい to say that the glowing state is both safer and preferable.

5. Sentence-ending のに adds a mild “that’s a shame” feeling

   • Here, のに does not start a full contradiction; it works like a soft lament that it would have been better if it were still glowing.