SolarMaxâ„¢ lamps are specifically designed for horticultural applications. ISO certified engineering and manufacturing processes assure high quality and optimized performance. SolarMaxâ„¢ Metal Halide Conversion lamps are designed to be used in High Pressure Sodium Ballasts. High quality for optimal performance Designed with the grower in mind Works with both magnetic and digital ballasts Reduced lamp sizes to fit most agri/horticultural lighting fixtures Custom tailored spectral distribution ensuring the highest PAR output All SolarMAX lamps carry a full one year manufacturer's warranty Made in Germany