Is this a good level to mount can lights?

Yes, this laser level can certainly be used for installation of can lights. The laser will be visible 30' or so. It will also put a crosshair on the ceiling and floor that acts as a plumb bob. If you have more questions, feel free to call us at 877-866-5688 or email at info@toolnut.com. We also offer live chat on our website for your convenience. Thank you!