600w Refrigerated Lighting Kit – Air Cooled HPS System for Temperature Control

The 600w Refrigerated Lighting Kit is the definitive weapon for growers who demand the massive yield potential of High-Pressure Sodium (HPS) lighting without the scorching heat that usually accompanies it. This complete system integrates a specialized air-cooled reflector that traps the heat generated by the bulb and allows your extraction system to remove it immediately, ensuring your indoor climate remains stable and your plants stay happy.

Why you are losing yield with standard reflectors

Many growers limit themselves to using standard open reflectors, believing that heat management is just a matter of opening a window or buying a stronger fan. They often end up raising the lamp so high to avoid burning the canopy that the plants receive weak light, or worse, they shut down their operation entirely during the summer months because the temperatures become unmanageable.

The cost of this limited approach is frustratingly high: you get fluffy, airy buds due to heat stress, you waste electricity cooling the room with AC, and you lose months of potential cultivation time. By not managing the heat at the source, you are forcing your plants to survive rather than thrive, sacrificing the density and terpene profile you worked so hard to achieve.

This refrigerated kit solves the problem at its root by encapsulating the bulb in a glass tube or box connected to your air extraction system. This versatile setup allows you to grow in tighter spaces, during hotter months, and with the light much closer to the canopy, unlocking the full potential of 600 watts of power in scenarios where a standard reflector would fail.

Summer growing and hot climates

The most obvious use for this kit is battling high ambient temperatures. When summer hits, a standard 600W HPS can turn a grow room into an oven, spiking temperatures above 30°C (86°F) and halting plant growth. With a refrigerated reflector (like a Cooltube, Spudnik, or Raptor), the heat is sucked away before it ever enters the room's environment.

This means you can continue your cycle even when it's hot outside. You won't have to pause your hobby or worry about heat stress causing hermaphroditism. It allows you to maintain that sweet spot of 24-26°C, ensuring your plants can metabolize nutrients properly and pack on weight.

Maximizing yield in tight spaces

Another brilliant way to use this kit is in spaces with limited vertical height. In a standard setup, you need to keep a 600W lamp at least 50-60 cm away from the tips. With this air-cooled system, you can safely lower the light to 20-30 cm from the canopy (depending on the reflector model and airflow).

By getting the light closer, you drastically increase the lumens reaching the buds (thanks to the inverse square law of light). This results in rock-hard, dense flowers even on the lower branches, maximizing the efficiency of your grow tents without the risk of burning the tips.

How to choose the best configuration for you

Since this kit is customizable, you can tailor it to your specific style. Here is how to decide:

• If you want maximum reflection: Choose a high-end reflector like the Raptor or Radiant; they cover a larger footprint and have superior reflective materials.
• If you are on a budget or have a small tent: A standard Cooltube or Spudnik is compact, effective, and gets the job done perfectly.
• If you want efficiency: Always opt for the electronic ballast over the electromagnetic one. It runs cooler, extends bulb life, and often has a dimmer switch.

Advantages and benefits of the refrigerated kit

• Temperature Control: Reduces the heat emitted by the bulb by up to 40-50%, making climate control much easier.
• Closer Proximity: Allows you to place the light closer to the plants, increasing light penetration and bud density.
• Versatility: Compatible with both HPS (flowering) and MH (growth) bulbs, giving you a full-cycle solution.
• Pest Prevention: Cooler temps discourage heat-loving pests like spider mites.
• Energy Efficiency: When paired with an electronic ballast, you get more lumens per watt and a stable light spectrum.
• Customizable: You choose the reflector, ballast, and bulb brand (Philips, Sylvania, Agrolite, etc.) to fit your budget and goals.

Frequently Asked Questions

Do I need a separate extractor for the light?

Ideally, yes. While you can hook it up to your main extractor, setting up a dedicated circuit for the light (intake -> reflector -> extractor -> out) is the most efficient way to ensure no heat enters the room.

Does the glass reduce the light intensity?

The glass does absorb a tiny percentage of light, but the ability to move the lamp significantly closer to the plants more than makes up for this loss, resulting in a higher total PAR reaching your canopy.

What ballast should I choose?

We strongly recommend the electronic ballast. It eliminates the flickering of magnetic ballasts (which stresses plants), runs silent, and produces less heat itself.

Can I use this kit for autoflowering plants?

Absolutely. Autoflowers love light, and this kit allows you to give them high intensity for 18 or 20 hours a day without overheating the tent. Combine it with good cannabis fertilizers for monster yields.

Personal Experience of Pevgrow’s CEO (Alan)

I've used these refrigerated kits for years, especially when testing genetics during the Spanish summer. My favorite setup is pairing a Spudnik reflector with a dimmable electronic ballast. It gives me the flexibility to dial down the power during the hottest days or when the plants are young, and then crank it up to Super Lumens mode during peak flowering. If you are struggling with heat, this isn't just an upgrade; it's a necessity.