Ushio Hilux GRO CMH 315W 4200K Grow Lamp — main product image

Ushio Hilux GRO CMH 315W 4200K Grow Lamp

Ushio

Ushio Hilux GRO CMH 315W 4200K Grow Lamp

Name: Ushio Hilux GRO CMH 315W 4200K Grow Lamp
Brand: Ushio
SKU: Hilux GRO CMH

★★★★★2.9 (4 reviews)

Ushio Hilux GRO CMH 315W 4200K delivers optimized full-spectrum light engineered for vigorous vegetative plant growth.

$79.99*

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*Price sourced from Amazon.com. Last updated:Jul 14, 2026.Price and availability are subject to change.

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Overview

The Ushio Hilux GRO CMH 315W 4200K is a ceramic metal halide grow lamp engineered to deliver a carefully tuned light spectrum that closely mimics natural sunlight in the blue-white range. Unlike conventional metal halide or high-pressure sodium lamps, CMH technology produces a broader spectral output that includes UV and far-red wavelengths beneficial to photosynthesis, resulting in healthier, more compact plant growth during the vegetative stage. The 4200K color temperature makes this lamp particularly effective for promoting leaf development, root establishment, and overall structural vigor.

Designed for use in controlled indoor growing environments, the Hilux GRO CMH can serve as a primary light source in smaller grow spaces or as a spectral supplement alongside existing HPS lighting to fill in wavelength gaps. At 315 watts, it operates more efficiently than many higher-wattage alternatives, reducing heat output and energy consumption while still delivering strong photosynthetically active radiation. The lamp requires a compatible 315W CMH ballast for operation and fits into standard CMH reflector setups, making it a practical upgrade for growers looking to improve light quality without overhauling their entire system.

Key Features

Advanced Ceramic Technology: Features Ushio HiLux Ceramic Metal Halide technology with 315W power output and 4200K color temperature, delivering superior spectral distribution specifically optimized for photosynthetic efficiency and robust plant development throughout all growth stages

Enhanced Blue Spectrum: Provides exceptional blue light output that promotes healthy vegetative growth, stronger stems, compact plant structure, and increased robustness, making it ideal for both standalone use and HPS supplementation in professional growing environments

Optimized PAR Output: Delivers high ceramic mol output concentrated within the PAR spectral range (photosynthetic active radiation), ensuring maximum light energy is converted into usable wavelengths that directly fuel plant photosynthesis and accelerate growth rates

Energy Efficient Performance: Combines low energy consumption with high mol output to provide exceptional photosynthetic efficiency, reducing operational costs while maintaining optimal light levels for vigorous plant growth and development

Long-Lasting Durability: Engineered with extended average lamp life that delivers consistent performance over time, providing economical operation through reduced replacement frequency and sustained light quality throughout the lamp's lifespan

Specifications

Type

Ceramic Metal Halide (CMH)

Wattage

315W

Color Temperature

4200K

Brand

Ushio

Model

Hilux GRO CMH

Application

Plant Growth, HPS Supplementation

Pros & Cons

👍 Pros

Optimized 4200K spectral distribution promotes strong vegetative growth and photosynthetic efficiency
Ceramic metal halide technology provides a broader, more natural light spectrum than standard MH or HPS lamps
Can be used as a standalone light source or as a supplement to HPS setups for fuller spectrum coverage
315W wattage draws less power than many traditional 400W or 600W grow lamps

👎 Cons

Requires a dedicated 315W CMH-compatible ballast, which is sold separately
Single 315W lamp may not provide sufficient coverage for larger grow areas without supplemental lighting
Ceramic metal halide lamps are generally more expensive to replace than standard MH bulbs
Limited to a fixed 4200K color temperature, so a separate 3000K lamp is needed for flowering stages

Frequently Asked Questions

What is the difference between the 4200K and 3000K versions of the Ushio Hilux GRO CMH?

The 4200K version produces a cooler, blue-weighted spectrum ideal for vegetative growth stages, while the 3000K version emits a warmer spectrum better suited for flowering and fruiting phases.

Can this lamp be used as a supplement to existing HPS lighting?

Yes, the Ushio Hilux GRO CMH 4200K is designed to work as a standalone grow lamp or as a supplement to HPS systems, adding spectral wavelengths that HPS lamps lack.

What type of ballast does the Ushio Hilux GRO CMH 315W require?

This lamp requires a compatible 315W CMH/LEC ballast. It is not compatible with standard HPS or MH ballasts.

How long does this lamp typically last before needing replacement?

Ceramic metal halide lamps like the Hilux GRO generally maintain useful output for approximately 10,000 to 20,000 hours, though spectral output may shift over time, so periodic replacement is recommended for optimal growth results.