Electronic Ballast for HID Lamps (America Version) Model: GD-239-MH Rated Power: 39W Protection Class:II Input Voltage: 120V-277V Case Dimension:142L*90W*40H(mm) Frequency : 50/60Hz Carton Size: 48L*27W*10H(mm) Ta: -15¡æ to 40¡æ PCS/CTN:20 pcs Tc: Max.85¡æ APPROVAL:CUL FCC ROHS Technical Parameters: Protection class II Thermal Protection Casing: Aluminium Ambient temperature(ta):-15 to 40¡æ High Power Factor Casing temperature(tc):Max.85¡æ Power Factor(PF)¡Ã0.98 Constant Power Output Total Harmonic(THD)£¼15£¥ Over Voltage Protection Low Product Temperature Air Humidity(£¥):Min.5£¥ Max.85£¥ SAFETY: Type 1 Outdoor. Complies with FCC 47-CFR Part 18, Non-consumer. Use 4kV Min. Rated Lampholder. Use 5kV Min. Rated or UL style 3561 output wire. Install and ground in accordance with National Electric Code. Don¡¯t install insulation above or within 3 of ballast sides. CERTIFICATIONS: CUL FCC ROHS