Absolutely! You can add as many light strips together as you'd like. However, if you're using more than the power adapter is intended to light, you'll notice your light strips are dimmer than they should be. The power adapter included with 5M light tape is only intended to power one strip. the adapter included with 10M light tape is intended to power 2 strips, and the adapter included with 15M light tape is intended to power 3 strips.