ADJUST-A-WINGS 315W E40 4K LAMP

Description

ADJUST-A-WINGS 315W E40 4K LAMP is the 315W ceramic metal halide lamp in the 4200K daylight spectrum, designed for use with Adjust-A-Wings E40 CMH fixtures and compatible ballast systems, delivering the broad, balanced full-spectrum light that drives exceptional vegetative growth, compact morphology, and terpene-stimulating UV output. We have been recommending Adjust-A-Wings CMH lamps to UK growers since 2017 as a premium lamp choice for the unique Adjust-A-Wings reflector system.

Why the 4200K Daylight Spectrum Is Ideal for Vegetative Growth and Propagation

The 4200K colour temperature of this CMH lamp produces a daylight-balanced spectrum that closely approximates the full-spectrum quality of natural sunlight during the long summer days of peak vegetative growing season. This broad spectral profile — covering UV, blue, green, red, and far-red wavelengths continuously — provides the complete photosynthetic and photomorphogenic stimulus that plants have evolved to thrive under. Blue-dominant wavelengths in the 4200K spectrum drive the compact internode spacing, thick stem development, and broad leaf production that characterise well-grown vegetative plants. The UV content is a key distinction from HPS — UV drives trichome development, stimulates plant immune responses, and supports the secondary metabolite biosynthesis pathways that ultimately determine harvest quality. For growers who run plants under the same fixture from propagation through the full vegetative phase, the 4200K is the natural choice before switching to the 3000K lamp for flowering.

Compatibility, Lifespan, and Getting the Best from the Adjust-A-Wings System

The 315W E40 lamp is compatible with E40 CMH fixtures and dedicated 315W CDM digital ballasts. The Adjust-A-Wings reflector system’s innovative spreader geometry is specifically designed to distribute CMH arc tube output optimally, and pairing this lamp with an Adjust-A-Wings reflector delivers the full potential of CMH technology in terms of canopy uniformity and coverage. Maintain the lamp at the recommended distance for the wattage and reflector in use, and replace annually to maintain spectral quality and lumen output. For the complete vegetative-to-flowering lighting programme, pair the 4200K with the Adjust-A-Wings 3000K lamp to switch at flowering onset. Browse our full Adjust-A-Wings lamp and reflector range for the complete CMH lighting system.