Good lighting can make a room feel warm, polished, and elegant. We asked designers to share the home lighting mistakes they see most often in modern homes. Below, design experts share the common lighting mistakes that can make your home feel off. ❌ Failing to layer lightingWhen it comes to lighting, design pros say a layered effect is best. Keita Turner of Keita Turner Design aims for bulbs between 2,700 and 3,000 Kelvin.