Berean Study Bible
Be careful, then, that the light within you is not darkness.

King James Bible
Take heed therefore that the light which is in thee be not darkness.

American Standard Version
Look therefore whether the light that is in thee be not darkness.

Darby Bible Translation
See therefore that the light which is in thee be not darkness.

Douay-Rheims Bible
Take heed therefore, that the light which is in thee, be not darkness.

English Revised Version
Look therefore whether the light that is in thee be not darkness.

Young's Literal Translation
take heed, then, lest the light that is in thee be darkness;