Ever bought LED strip lights? Then you’ve definitely seen those labels—IP20, IP40, IP65, IP68. But here’s the thing. If you actually want those lights to last outdoors or in a bathroom, you gotta know what those numbers really mean. Pick the wrong one? First rain, or even just a little splash, and boom—flickering, rust, or just dead strips. So this guide? We’ll go over what IP ratings mean for waterproof LED strips, break down the common ones, and help you figure out what’s right for your setup.
IP? That’s Ingress Protection. Basically, two digits that tell you how sealed up something is. First digit is for solids—dust, dirt, that kind of thing. Second digit is for water, from dripping to dunking. For an LED strip, the IP rating is all about how much the circuit board, solder joints, and LEDs are kept safe from whatever’s around them. And that actually matters a lot. Because even a little bit of moisture? That can short stuff out, cause corrosion, or just kill the strip entirely.
A bare LED strip without any coating will typically carry an IP20 rating, meaning it offers no protection against water and only minimal protection against large particles, while a fully encapsulated strip designed for outdoor use will carry an IP65, IP67, or even IP68 rating depending on how thoroughly it has been sealed.
Choosing the correct IP rating for your LED strip project depends entirely on where you plan to install the lights and what kind of water exposure they will realistically face. The table below provides a quick reference for common installation scenarios.
| Installation Enviornment | Recommended IP Rating | Key Considerations |
| Bedroom, living room, office | IP20 | No water exposure, maximum flexibility and brightness |
| Kitchen under-cabinet | IP44–IP54 | Steam, occasional splashes from sink |
| Bathroom mirror or ceiling | IP65 | High humidity, direct splashes possible |
| Covered patio or eaves | IP65 | Wind-driven rain, no standing water |
| Garden pathway or decking | IP67 | Puddles, temporary flooding from rain |
| Pond edge or fountain surround | IP67 | Splashing plus occasional immersion |
| Underwater in fountain or aquarium | IP68 | Continuous submersion, check depth rating |
| Outdoor signage exposed to weather | IP65–IP67 | Direct rain and possible pressure washing |
For indoor applications such as under kitchen cabinets, behind televisions, or along bedroom ceilings where water is never a concern, an IP20 non-waterproof strip is perfectly adequate and will save you money.
If you are installing LED strips in a bathroom or kitchen near a sink or stove, an IP44 or IP54 strip offers basic protection against splashes and steam without the extra bulk and cost of full waterproofing.
For outdoor installations under covered patios, awnings, or eaves where the strip will be protected from direct rain but may still encounter humidity and occasional splashes, an IP65 strip is usually sufficient.
However, if you are installing LED strips along garden pathways, around ponds, or in any location where water might pool on the ground or where the strip could be temporarily submerged during a storm, you should choose at least an IP67 strip.
For permanent underwater installations such as inside a fountain, waterfall, or aquarium, IP68 is the only safe choice, and you should verify that the manufacturer explicitly states the depth and duration of submersion the strip can withstand.
Installing a waterproof LED strip correctly is just as important as choosing the right IP rating, because even an IP68 strip can fail if the installation introduces weak points where water can enter. Follow these key tips to ensure your installation maintains its rated protection:
Most IP65 silicone sleeves remain flexible in cold temperatures, but you should check the manufacturer’s temperature rating because extreme cold below -20°C can cause some silicone materials to become brittle and crack.
No, IP65 only protects against water jets, not immersion. Submerging an IP65 strip will cause water to enter through the ends and destroy it.
No, cutting breaks the seal. You must reseal the cut end immediately with silicone or an end cap to restore waterproofing.
Yes, the thick encapsulation required for IP67 and IP68 can reduce light output by ten to thirty percent compared to an IP20 strip.
Yes, a waterproof LED strip connected to a non-waterproof power supply will fail just as quickly. Use an IP65 or higher rated driver for outdoor installations.
