The Bulb HPS250W by Secret Jardin is a high-performance high-pressure sodium lamp engineered specifically for the flowering phase of plant cultivation. Delivering 250 watts of power, it emits a rich, warm-spectrum glow with a color temperature of 2000 K. Built with an E40 base, it connects easily to standard horticultural ballasts and fixtures. Measuring approximately 255 mm in length and weighing around 135 grams, this lamp produces a luminous output of about 32,250 lumens with an efficiency of roughly 125 lumens per watt. Designed for intensive use, it achieves optimal brightness within five minutes of ignition and can safely restart after just three minutes of cooling. Its construction supports high thermal demands, with maximum temperatures reaching up to 400 °C at the bulb and 250 °C at the base, ensuring reliability during prolonged use. The Secret Jardin Bulb HPS250W grow lights are highly effective, but if you want to dip your toes into other devices, then check out their HPLED 200W Full Spectrum or even the Cosmorrow 100w Full Spectrum.
