When selecting wall lights, prioritize Luminous Efficacy (lm/W) to ensure energy efficiency and Color Rendering Index (CRI), where a CRI > 80 is standard for residential use and CRI > 90 is preferred for high-end retail or galleries. Additionally, verify the Ingress Protection (IP) Rating; for indoor dry areas, IP20 is sufficient, but for bathrooms or outdoor installations, a minimum of IP44 or IP65 is required to ensure moisture and dust resistance. Lastly, confirm the Driver Quality, specifically looking for flicker-free performance and a lifespan rated for at least 30,000 to 50,000 hours.