Radium - 400w Bulb

Radium 400W High Pressure Sodium Grow Lamp (E40)

The Radium High Pressure Sodium Lamp is a professional-grade horticultural bulb engineered for high-output flowering and fruiting stages. Radium is a long-established German lighting manufacturer, and this lamp is a reliable, industry-standard choice for growers running E40-fitting HPS setups.

Key Specifications:

• Wattage: 400W
• Fitting: E40 Screw
• Lamp Type: High Pressure Sodium (HPS)
• Energy Efficiency Category: E
• Compatibility: Standard magnetic and digital HPS ballasts

Best suited to the flowering/bloom stage, where HPS lighting's warm, red-heavy spectrum drives strong bud and fruit development.