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

New King James Version
Therefore take heed that the light which is in you is not darkness.

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

Berean Study Bible
Be careful, then, that the light within you is 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.

World English Bible
Therefore see whether the light that is in you isn't darkness.

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

Luke 11:35 Additional Translations ...