One of the most common questions growers ask about the RX-PAR38 grow light is whether it’s waterproof. The answer is yes — the RX-PAR38 is designed with an IP65 waterproof rating, making it one of the most durable and weather-resistant grow lights in its class.

Koray Lighting RX-PAR38 waterproof testing and quality control

What Does IP65 Rating Mean?

The IP (Ingress Protection) rating system defines the level of sealing effectiveness of electrical enclosures against intrusion from foreign bodies and moisture. The IP65 rating breaks down as follows:

  • 6 (First digit): Complete protection against dust ingress. The fixture is entirely dust-tight, which is critical for maintaining LED performance in environments with soil, plant debris, or other particulates.
  • 5 (Second digit): Protection against water jets. The RX-PAR38 can withstand low-pressure water jets from any direction without damage to internal components.

This means the RX-PAR38 can handle splashing water, rain (if installed in a covered area), and high humidity without compromising performance or safety.

Waterproof Design Features

Koray Lighting’s RX-PAR38 incorporates several design elements to achieve its IP65 rating:

  • Sealed LED compartment: The LED chips and circuit board are housed in a sealed enclosure with silicone gaskets, preventing water from reaching sensitive electronics.
  • Waterproof cable glands: The power cable entry point uses industrial-grade waterproof cable glands (PG9 or M12) with rubber seals to block moisture ingress.
  • Corrosion-resistant heat sink: The aluminum heat sink is treated with anodized coating or powder coating to resist corrosion from humidity and water exposure.
  • Drainage design: Strategic drainage holes at the bottom of the housing allow any condensation to escape, preventing water accumulation inside the fixture.

Koray Lighting exhibition showcase featuring waterproof grow lights

Where Can You Use the RX-PAR38?

Thanks to its IP65 rating, the RX-PAR38 is suitable for a wide range of growing environments:

  • Hydroponic systems: The waterproof design allows installation directly above NFT channels, DWC systems, or aeroponic setups where water splashing is common.
  • Humid grow rooms: Tropical plants, mushrooms, or orchids often require humidity levels above 70%. The RX-PAR38 can operate reliably in these conditions without degradation.
  • Covered outdoor installations: While not submersible, the RX-PAR38 can be used on covered patios, under pergolas, or in greenhouse eaves where it’s protected from direct rain but still exposed to moisture.
  • Commercial plant factories: The waterproof rating makes it easy to clean and sanitize between crop cycles, meeting hygiene standards for commercial operations.

What the RX-PAR38 Is NOT Designed For

While the RX-PAR38 is waterproof, it’s important to understand its limitations:

  • Not submersible: IP65 means it can handle water jets, but it should not be submerged in water. For underwater applications, IP68-rated fixtures are required.
  • Not for high-pressure washing: Avoid using high-pressure water jets (IP66/IP67 territory) directly on the fixture, as this could compromise the seals over time.
  • Cable connections need protection: While the fixture itself is waterproof, the cable connections should be kept dry or use additional waterproof connectors for outdoor installations.

Long-Term Durability

Koray Lighting’s RX-PAR38 undergoes rigorous testing to ensure long-term waterproof performance:

  • IP testing: Every batch is tested in dust chambers and water spray booths to verify IP65 compliance.
  • Thermal cycling: Fixtures are tested across temperature ranges (-20°C to +45°C) to ensure seals don’t degrade with expansion and contraction.
  • UV resistance: The plastic lenses and rubber seals are UV-stabilized to prevent cracking or yellowing from sunlight exposure.
  • 35,000+ hour lifespan: The waterproof design helps protect internal components from corrosion, contributing to the long operational life.

Maintenance Tips for Waterproof Performance

To maintain the IP65 rating over the fixture’s lifetime:

  • Periodically inspect the silicone gaskets and seals for signs of wear or damage.
  • Ensure cable glands are properly tightened if the fixture is moved or reinstalled.
  • Clean the lens with soft cloth and mild detergent — avoid abrasive cleaners that could damage seals.
  • If operating in extremely humid conditions, ensure adequate ventilation around the fixture to prevent excessive condensation.

The RX-PAR38’s IP65 waterproof rating makes it a versatile, reliable choice for indoor and covered outdoor growing applications. Combined with Koray’s secondary optics system for uniform PPFD distribution and multiple spectrum options (S85, S93, K6), it offers both durability and performance.

For technical specifications or to order RX-PAR38 fixtures, visit www.koraylights.com.