IP65 means a light is dust-tight and protected against low-pressure water jets from any direction, so splashes and spray will not harm it. IP67 means dust-tight and protected against temporary immersion in water up to one meter for 30 minutes. For almost every indoor garden either rating is enough, and neither means a light is meant to live underwater.
What an IP rating is
IP stands for ingress protection. The rating comes from an international standard, IEC 60529, and says how well an enclosure keeps out solid objects such as dust and liquids such as water. It is written as IP followed by two digits:
- The first digit (0 to 6) is protection against solids. A 6 means completely dust-tight.
- The second digit (0 to 9) is protection against water. The higher the number, the more severe the test, but the tests are different, not simply stronger versions of each other.
IP65: dust-tight and protected against water jets
The 6 means no dust gets in. The 5 means the light has been tested against low-pressure jets of water from a nozzle, sprayed from any direction. That matches the kind of water a grow light actually meets: a watering can that slips, a spray bottle, condensation, a splash from a reservoir.
IP67: dust-tight and protected against temporary immersion
The 6 is the same. The 7 means the light has been tested by being submerged in still water up to one meter deep for 30 minutes. It tells you the housing keeps water out when it is briefly dunked, for example if a tray overflows or the light falls into a reservoir.
| Rating | Dust | Water | Think of it as |
|---|---|---|---|
| IP65 | Dust-tight | Low-pressure water jets from any direction | Splash-proof and spray-proof |
| IP67 | Dust-tight | Temporary immersion, 1 meter for 30 minutes | Survives an accidental dunking |
Is IP67 better than IP65?
Not automatically. They test different hazards, and a higher number does not always cover the lower one. A product tested for water jets can fail an immersion test and vice versa, and some products are rated for both and written IP65/IP67. For a grow light, the practical difference is this: IP65 covers splashes and spray, which is the everyday risk, while IP67 adds protection against brief submersion, which is a rare accident. A light rated for both has the widest margin.
What the rating does not cover
- It is for the fixture as tested. Plugs, power cords, timers, dimmer boxes and extension cords have their own ratings, and many are not water-resistant at all.
- It is not permanent immersion. IP67 is a 30-minute test, not a promise to run underwater.
- It can wear. Seals age, and damage to the housing or cord can let water in. Inspect your lights.
- It is not a reason to relax about electricity. Water and mains power are still a hazard, so keep connections dry and use a GFCI outlet.
- Condensation is different from splashes. A well-sealed light still needs air movement in a humid tent.
Which rating do you need?
| Your setup | What to look for |
|---|---|
| A dry shelf or room with careful watering | IP65 is plenty |
| A grow tent where you water, spray or mist | IP65 or higher |
| A hydroponic garden with reservoirs and splashes | IP65 or IP67; keep cords and plugs dry |
| A humid room, or lights hung low over water | IP67, or IP65/IP67 dual-rated |
How to protect connections
- Choose a light whose wiring harnesses are assembled with waterproof connections.
- Keep plugs, timers and power strips off the floor and away from the reservoir.
- Use a GFCI outlet or adapter.
- Let cords hang in a loop below the connection so that water drips off before it reaches it.
- Switch off and unplug the light before cleaning near it.
Hydroponics and tents
Hydroponic gardens and grow tents are exactly the places where water meets lights, so a rating matters. See LED grow lights for hydroponics and grow tent lighting setup.
The full water-protection scale
The second digit of an IP rating runs from 0 to 9. Each number is a separate test:
| Second digit | Protection |
|---|---|
| 0 | No protection |
| 1 | Vertically dripping water |
| 2 | Dripping water with the enclosure tilted up to 15 degrees |
| 3 | Spraying water |
| 4 | Splashing water from any direction |
| 5 | Low-pressure water jets from any direction |
| 6 | Powerful water jets |
| 7 | Temporary immersion up to 1 meter for 30 minutes |
| 8 | Continuous immersion beyond 1 meter, under conditions the maker specifies |
| 9 | High-pressure, high-temperature water jets |
The dust digit
The first digit runs from 0 to 6 for solids. A 5 means dust-protected, so a small amount may enter but not enough to harm the device, and a 6 means completely dust-tight. Both IP65 and IP67 have a 6, which is why they are listed together so often.
Keeping the rating working
- Do not spray a light directly with a hose or pressure washer unless the maker says it is allowed.
- Wipe it with a damp cloth with the power off and the plug removed.
- Check cord entries and seals for cracks, and replace damaged cords.
- Never open the housing, which breaks the seal and may void the warranty.
Questions about IP ratings
Can I leave an IP67 light underwater?
No. IP67 covers temporary immersion of 30 minutes at up to one meter. It is not made for continuous submersion.
Is an IP65 light safe in a humid tent?
It is built to keep out spray and splashes. Humidity and condensation are best managed with airflow, and a GFCI outlet adds protection.
Does a rated light make the plug safe?
No. Check the plug, the power supply and the timer separately, and keep them dry.
How do I find the rating of my light?
It is on the label or in the specifications. My LED Grow Lights are IP65 (water-resistant) or IP67 (waterproof) rated, so check the product description for the rating of your model.
Key takeaways
- IP65 means dust-tight and protected against water jets; IP67 means dust-tight and protected against temporary immersion.
- They test different hazards, so neither is simply better; IP65/IP67 dual-rated lights cover both.
- The rating covers the fixture as tested, not plugs, timers or extension cords.
- Keep connections dry, use a GFCI outlet and inspect seals and cords.
- My LED Grow Lights are IP65 or IP67 rated, with waterproof connections on every wiring harness.
Choosing in practice: a few scenarios
- You water by hand in a tent. Splashes and the odd spray are the risk, so IP65 does the job. Keep the plugs and timer outside the wet zone.
- You run a hydroponic rack over trays of water. A tipped tray or an overflowing reservoir is possible, so IP65/IP67 is the safer choice, along with a GFCI outlet.
- You grow in a damp basement. Condensation is the bigger problem than splashing. Choose a sealed, rated light, add airflow and check connections for corrosion.
IP rating is not a safety listing
An IP rating says how well the housing keeps water and dust out. A separate safety listing, such as UL or ETL, says that the electrical design has been tested against shock and fire hazards. Look for both, and treat the IP rating as one part of a safe setup rather than the whole.
My LED grow lights and water
My LED Grow Lights are IP65 (water-resistant) or IP67 (waterproof) rated. For the indoor grower with hydroponic setups, you can rest easy knowing that accidental water splashing or spraying of the lights will not be a problem. All power cords and lights operate on 120v/240v and all wiring harnesses are assembled with waterproof connections for even more peace of mind. See all of our LED grow lights, or return to LED grow light power and safety.