- This solar-powered Paulmann House Number light charges in the day and glows at night - no cable needed - It gives off a warm white light at 3000 K, so the number is easy to read when it gets dark - With an IP44 rating, it's splash-proof and suitable for outdoor use - It includes a rechargeable battery which you can easily replace when it stops holding charge - Use it alone, or pair it with other digits (sold separately) to show your full house number