User blog comment:Lord Loss/Monster Hunter Frontier G 2 Discussion/@comment-16119585-20130911170756/@comment-16119585-20130911175351

No, Light as in light. It's one of 4 confirmed new element that revealed during Frontier G press confrence.

Kanji listed in weapon is "光(Hikari)" meaning light, if lightning/thunder it has "雷(Rai)" instead.