Wise
Sensible
You're clever and bright so obviously you're going to make wise and sensible decisions. In fact, when you go to make these very wise choices and observations, your brain glows brightly.
けんめい
This is a jukugo word that uses the on'yomi readings of the kanji. You should be able to read this on your own.
このビールを買うのは賢明なご決断ですよ。コクがあるだけでなく、喉ごしもとてもいいですからね。
Buying this beer is a wise decision. Not only does it have full-bodied flavor, but it also has such a pleasant, clean finish.