unfortunately , I can not review the quality of the light alarm on this clock because mine arrive and do not work . however , I can tell you that the sound alarm on this clock be SUPER LOUD !!! because mine be defective , I arrange to return it to Amazon because it tell I that a replacement be not available . before I could even return it , the Westclox people contact I and offer I a replacement or refund . before I could even respond to they they have issue I a refund and tell I I do not need to return the clock . this be great customer service . also , delivery fulfillment through Amazon be very fast , as usual .