... designed angle to maximize lighting reflection efficiency.4. Stainless steel fasteners.5. Ballast protection from short-circuit, open-circuit or defective ... short time.11. Protection: Ballast is protected from damage due to short-circuit, open-circuit, power cut-off, defective lamp, etc, ballast ... heat dispersion than LED, and with 3 times longer life due to no electrode or filament.14. CCC, CE, UL, ...