600 Watt Double Ended HPS & MH Grow Lights
The 600W double-ended HPS fixture occupies an important position in the commercial grow lighting lineup -- providing meaningfully higher light output than single-ended 600W HPS (DE fixtures produce approximately 15-20% more lumens per watt than SE equivalents at the same wattage) while drawing less power than 1000W DE systems. For 4x4 to 5x4 ft canopy footprints, a 600W DE HPS provides 600-900 umol/m2/s PPFD at the canopy -- appropriate for most flowering programs including high-intensity commercial vegetable and specialty crop production. For operations where 1000W DE is more than needed for the canopy size, the 600W DE provides commercial-grade output at lower capital and operating cost.
600W DE vs. 1000W DE and 600W SE
The 600W DE fixture sits clearly between the 600W SE and 1000W DE in performance. Versus 600W SE: DE technology produces approximately 10-20% more usable photons at the same wattage by allowing both ends of the lamp arc to contribute output, and the DE 600W lamp maintains output better over its service life than SE lamps. Versus 1000W DE: the 600W draws 40% less power, generates proportionally less heat (meaningful for tent and small-room grows where heat management is already at the limit), and is better suited to the 4x4 to 4x5 ft canopy range that the 1000W DE over-powers at standard hanging heights. Browse our complete double-ended grow lights collection alongside our full HPS and MH range for all DE wattages and configurations.
DE Ballast & Lamp Compatibility
600W DE fixtures require a compatible DE-rated ballast -- standard SE HPS ballasts are not interchangeable with DE systems. DE ballasts operate the lamp at different frequency and voltage characteristics that the DE lamp requires and standard SE lamps are not designed for. Most 600W DE fixtures are sold as complete systems including ballast, reflector, and lamp; replacement DE 600W HPS lamps are also available separately for annual replacement. Replace DE lamps annually in production environments -- DE lamps maintain output better than SE but still lose 10-15% of initial output by 10,000-12,000 hours. Fast shipping.
600 Watt DE Grow Lights FAQ
What canopy size does a 600W DE HPS fixture cover?
A 600W DE HPS fixture at 24-30 inches hanging height covers a 4x4 ft footprint at approximately 700-900 umol/m2/s PPFD at canopy center -- appropriate for most flowering programs. At 36 inches hanging height, the coverage spreads to 4x5 ft at somewhat lower center intensity. For SCROG or full-canopy training programs targeting maximum coverage uniformity, 24-26 inches is the typical hanging height in a 4x4 ft space. Confirm with the specific fixture's published PPFD map rather than using general estimates.
What is the difference between 600W DE and 600W SE HPS?
Double-ended (DE) HPS lamps connect at both ends of the arc tube, allowing both ends to contribute to the lamp's total output and running the lamp at higher efficiency. Versus single-ended (SE) equivalents: DE produces approximately 10-20% more photons per watt, the lamp operates at higher temperature that maintains output through a longer service life, and DE lamps degrade more slowly over their service life. The tradeoff: DE fixtures require dedicated DE ballasts (not interchangeable with SE ballasts), DE lamps run hotter requiring more clearance from reflector surfaces, and complete DE fixture systems cost more than SE equivalents.
Do I need an air-cooled reflector for a 600W DE fixture?
Air-cooled reflectors are highly recommended for 600W DE HPS in tent environments. The 600W DE lamp generates significant infrared heat -- without active heat extraction from the fixture, tent temperatures rise substantially above ambient, forcing the fixture higher from the canopy and reducing effective PPFD at plant level. An air-cooled DE reflector with 6-inch duct ports connected to the exhaust inline fan extracts lamp heat directly, allowing the fixture to hang 18-24 inches from the canopy while maintaining safe canopy temperatures. For open grow rooms with sufficient headroom and active HVAC, open-wing DE reflectors work without air-cooling.
How often should I replace 600W DE HPS lamps?
Replace 600W DE HPS lamps annually in production environments -- or every 10,000-12,000 hours of operation, whichever comes first. At 18 hours per day, 10,000 hours is approximately 18 months. DE lamps maintain output better than SE (approximately 85-90% of initial output at 10,000 hours versus 70-75% for SE) but still produce measurably less light than a fresh lamp by the end of their service life. Annual lamp replacement on a fixed schedule is more reliable than attempting to measure output decline, and replacement lamp cost is small relative to the lost production value from running degraded lamps.
Can a standard HPS ballast run a 600W DE lamp?
No -- 600W DE HPS lamps require DE-compatible ballasts. Standard SE HPS ballasts operate at different frequency and current characteristics than DE ballasts require. Running a DE lamp on an SE ballast risks immediate lamp failure and potential ballast damage. DE ballasts are specifically designed for DE lamp electrical characteristics. Most 600W DE fixtures are sold as complete systems with matched ballasts; when sourcing a replacement ballast for an existing DE fixture, verify it is specified as DE-compatible at 600W.