A prime example of this lighting swap entails replacing a few ceiling incandescent bulbs with BlissBulbs. These blue, green, or—for maximum Halloween spookiness—red lights offer just enough starry-sky lighting to discern the basics of your room. What they do not do is flood your space with so much illumination that your eeriest Halloween props become plainly visible. They metamorphose your abode into the ideal atmosphere for a Halloween surprise that will jolt your guests.