1) Create Eerie Shadows.
To make shadows loom large and creepy, you'd better place lights low to the ground and aim them slightly upward.
2) Add Some Creepy Colors.
Orange, Purple, and green are the signature light colors of the season, and when placed into different combinations they become a unique backdrop of illumination to highlight your wickedly fun style! Keep things classic with orange and purple Halloween lights, create a spellbinding scene fit for a witch with purple and green hues, or try a whimsical display of green and blue that all the little monsters will love! Be Bold & Beware: If you're going for downright frightening, all red lights can be just plain scary!
3) Use Flickering Flames. Fire is a great way to create a chilling ambiance.
4) Try Scary Strobe Light Mode.
With one power outlet to enable the whole set of four/six floodlights, you don't have to buy extra extension cords to hook them all up. No need for a network, app installation & pairing, Novostella ColorBand Remote Controlled Flood Lights are super easy to use. 4 Dynamic Modes (including Strobe Mode) and 8 Colorflow Modes (including rainbow, flow, chase, jump, fade, breath, flash mode) are available.
5) Don't Forget Fog.