6 Best LEC Grow Lights of 2026

Updated for 2026 — This article has been reviewed and updated with the latest recommendations.

LEC (Light Emitting Ceramic) grow lights, also known as CMH (Ceramic Metal Halide), occupy a unique position in the grow light market. They produce a broad, sun-like spectrum that includes UV-A and UV-B wavelengths, which many growers believe enhances trichome production and terpene development. While LEDs have taken over the market, LEC/CMH lights still have a dedicated following among growers who prioritize spectrum quality over pure efficiency.

Here are six LEC grow lights worth considering in 2026.

Quick Comparison

Understanding LEC vs LED in 2026

LEDs have won the efficiency war.

A modern Samsung diode LED produces more usable light per watt than any CMH fixture. But efficiency is not the only metric that matters. CMH/LEC bulbs produce a continuous full spectrum that includes UV wavelengths which most LEDs do not emit. Some growers report measurably higher trichome density and more complex terpene profiles under CMH lighting compared to LED. The trade-off is more heat, shorter bulb life, and higher electricity costs per photon.

1.

Sun System LEC 315W

The Sun System LEC 315 has been the benchmark CMH fixture since the category emerged. It uses a Philips 315W ceramic metal halide bulb in a purpose-built reflector with an integrated ballast. The 3100K bulb produces a warm spectrum ideal for flowering, with significant UV output that promotes resin production.

The build quality is commercial-grade with a five-year warranty on the ballast. The reflector distributes light evenly across a 4x4 footprint. Heat output is moderate and manageable with standard tent ventilation. At $400, it is the most proven and reliable CMH option. Replacement bulbs cost about $60-80 and last approximately 20,000 hours, or roughly two years of typical 12/12 flowering cycles.

Check Latest Price

2.

Vivosun 315W CMH Kit

Vivosun offers a complete 315W CMH kit at half the price of the Sun System. The kit includes the ballast, reflector, and a Philips 3100K bulb. Performance is comparable to the Sun System in terms of light output and spectrum. The main differences are in build quality and warranty, with the Vivosun feeling less premium but functioning identically.

At $200, this makes CMH growing accessible to budget-conscious growers.

The ballast runs a bit warmer than the Sun System, so adequate ventilation is important. The reflector is basic but functional. If you want to try CMH lighting without the premium price commitment, this is the logical starting point. Many growers run these for multiple grow cycles without issues.

Check Latest Price

3. Growers Choice 630W DE CMH

For larger grow spaces, the Growers Choice 630W uses a double-ended CMH bulb that produces more light than two separate 315W fixtures.

The DE design is more efficient than single-ended bulbs and distributes light more evenly. Coverage extends to a full 5x5 footprint with good edge intensity.

The fixture is built for commercial use with a robust housing and reliable ballast. At $500, it competes with mid-range LED panels on price while offering the full-spectrum UV benefits that CMH is known for. The double-ended bulb design requires a specific socket, so replacement bulbs are limited to DE CMH options.

Heat output is significant and requires proper extraction.

Check Latest Price

4. Sun System LEC 630W

The Sun System 630 uses two 315W Philips bulbs side by side in a wide reflector. This dual-bulb approach covers a 5x5 area effectively and gives you the option of running different color temperature bulbs, like one 3100K for flowering spectrum and one 4200K for blue-heavy vegetative spectrum.

At $550, it is the premium option for large CMH setups. The dual-bulb flexibility is a genuine advantage for growers who want to customize their spectrum.

Build quality matches the 315W model with the same commercial-grade construction and warranty. The reflector is wider to accommodate both bulbs and maintains even light distribution across the coverage area.

Check Latest Price

5. TopoGrow 315W CMH

The TopoGrow is the ultra-budget entry at $150 for a complete kit. It includes a ballast, reflector, and Philips bulb.

The build quality is the lowest on this list, with a thinner reflector and a ballast that runs warmer than premium alternatives. That said, it produces the same light as any other 315W CMH because it uses the same Philips bulb.

For growers who want to experiment with CMH lighting at minimum cost, this gets the job done. The 4200K bulb included is better suited for vegetative growth. You may want to buy a separate 3100K bulb for flowering.

At this price, even if you upgrade later, you have not lost much.

Check Latest Price

6. Phantom CMH 315W

Phantom makes professional-grade lighting equipment, and their CMH 315 features a digital ballast with multi-voltage capability (120V/240V) and a four-step dimming function. The ballast quality is exceptional with very low harmonic distortion, which means consistent output and longer bulb life.

At $350, it slots just below the Sun System on price while arguably matching it on ballast quality.

The dimming feature is useful for managing heat in summer or reducing intensity during early growth stages. The reflector is wide and efficient. A solid choice for growers who want premium ballast technology without the Sun System price tag.

Check Latest Price

Should You Choose LEC/CMH in 2026?

If maximum efficiency and lowest operating cost are your priorities, LEDs are the better choice. If spectrum quality, UV output, and terpene development matter more to you than electricity savings, CMH/LEC still has a legitimate place in the grow room. Some growers run CMH for the last two weeks of flower specifically for the UV boost, even if they use LEDs for the rest of the cycle. The best setup depends on your priorities, budget, and willingness to manage the extra heat.