What factors should be considered when designing an LED lighting retrofit?

LED retrofit considerations include: existing fixture compatibility and wiring, driver compatibility with existing dimmers, color temperature consistency (CCT typically 3000-4000K for commercial), color rendering index requirements (CRI 80+ for general, 90+ for retail), lumen output to match or exceed existing lighting levels, thermal management for enclosed fixtures, and power quality (THD, power factor). Calculate energy savings and payback period. Address emergency lighting and controls integration.