Sunmaster Cool Deluxe Metal Halide Bulb 7200K – Blue Spectrum Grow Lamp for Vegetative Growth

The Sunmaster Cool Deluxe Metal Halide Bulb at 7,200K is the UK market-leading grow lamp for blue spectrum lighting, trusted by experienced growers for delivering healthier plants, shorter internodal spacing, and stronger overall development during the vegetative stage.

Why 7,200K?

Blue light is measured in Kelvin (K) rather than lumens. The higher the Kelvin rating, the more plant-usable blue light the lamp produces. At 7,200K, the Sunmaster Cool Deluxe delivers an intense blue spectrum that promotes compact, vigorous vegetative growth and prepares plants for a strong transition into later stages.

Key Features

• 7,200K colour temperature – high blue spectrum output
• Promotes compact growth, reduced internodal length, and improved plant structure
• UK market leader in horticultural metal halide lamps
• Excellent value for money with consistent, reliable performance
• Compatible with standard metal halide ballasts

Mixed Lighting Tip

Adding one metal halide lamp to every two HPS (sodium) lamps in your lighting setup significantly improves overall plant health by supplementing the red spectrum with essential blue light. This 1:2 ratio is widely regarded by experienced growers as the optimum mixed-spectrum approach.

Please Note

As with all horticultural lamps, light output will decrease gradually with use. Regular replacement ensures consistent performance throughout your growing cycle.