Lumatek's high-par output lamps are designed by the world's leading HID lamp engineers. These lamps provide exceptional performance on both magnetic and electronic ballasts. 100% European engineered and manufactured Lumatek's high-par output lamps deliver an optimized spectrum and high level of Photosynthetic Active Radiation to promote healthy plant growth. These lamps have strengthened seals and a reinforced arc frame to ensure that they will provide long lasting performance with stable lumen output.