It depends on what you’re illuminating. Here is a breakdown of how to use each color temperature range. Warm White: 2000K-3000K Warm white light creates an intimate atmosphere that promotes calmness and relaxation. This is perfect for decorative outdoor lighting or areas such as outdoor living rooms and outdoor kitchens. Cool White: 3100K-4500K Cool white light is bright and vibrant, which is excellent for chasing away shadows and giving individuals a clear view of their surroundings. Using cool white light is ideal for areas that require focus for safety purposes, including the following: 1. Stairs 2. Outside of Sheds 3. Outdoor Workshops 4. Pathways