---
title: "Xingguang | IP66 Floodlights | LED Lighting"
description: "IP66 belongs where water arrives with pressure: driving rain, docks, wash bays. The failure mode that gets overlooked outdoors is not water getting in, it is moisture not getting out. A breather valve does more than a thicker housing — without one the inside fogs within a year."
url: "https://www.xingguanglightingcn.com/en/spec/ip66-floodlight"
lang: "en"
updated: "2026-10-28"
markdown: "https://www.xingguanglightingcn.com/en/spec/ip66-floodlight.md"
---

[Home](https://www.xingguanglightingcn.com/en/) / [Selection by specification](https://www.xingguanglightingcn.com/en/spec/) / IP66 Floodlights

# IP66 Floodlights

[IP66](https://www.xingguanglightingcn.com/en/glossary#ip-rating) belongs where water arrives with pressure: driving rain, docks, wash bays. The failure mode that gets overlooked outdoors is not water getting in, it is moisture not getting out. A breather valve does more than a thicker housing — without one the inside fogs within a year.

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## Key parameters

| Power | 100–200 W |
| --- | --- |
| Luminous flux | 12,000–25,000 lm |
| IP rating | IP66 |
| First digit: solids | 6 / 完全防尘 |
| Second digit: water | 6 / 强喷水 |
| Impact rating | IK08 |
| Ambient temperature | -30 … +50 ℃ |

[Product family: Floodlights](https://www.xingguanglightingcn.com/en/product-categories/floodlight)

## The two IP digits govern two different things

This page is IP66: first digit 6 / 完全防尘 (solids), second 6 / 强喷水 (water). The common misreading is to treat it as one water-resistance score. The first digit is about dust and finger access; only the second is about water, and it grades **how the water arrives** — dripping, spraying, jetting, powerful jetting, and a close-range high-pressure hot jet are five different things.

The other point that gets missed: the rating applies to the complete fixture — terminal chamber, cable entry and breather included — not to the housing material. An IP66 fixture with a loose cable gland has already failed, whatever rating was specified.

## Same power, different site

At 100–200 W and 12,000–25,000 lm, an IP66 fixture reaches some sites and not others. The test is not "is this IP high enough" but three questions: where does the water come from, does it arrive with pressure, and does it pool on the floor. One "with pressure" answer and you step up a level.

One more that has nothing to do with IP and is just as fatal: ambient temperature. In a sealed chamber at 100–200 W, every 10 ℃ above the rated ambient roughly halves driver life. On hot sites check the ta rating and the measured driver case temperature together — IP alone misses half the problem.

## Four things to verify before ordering

① Whether flux and [efficacy](https://www.xingguanglightingcn.com/en/glossary#efficacy) are quoted for the complete fixture or the light source — a 10–15% difference that changes the fixture count. ② Whether [colour temperature](https://www.xingguanglightingcn.com/en/glossary#cct) and CRI are measured or nominal values; mixed CCT within one batch is the most common arrival dispute. ③ Driver brand and model, plus its derating curve at high temperature — it is the only part that really sets life. ④ The mounting kit list: chain, bracket and anchors in the box, or the site stops for a day.

## Concepts on this page

[IP rating](https://www.xingguanglightingcn.com/en/glossary#ip-rating)[Flood light](https://www.xingguanglightingcn.com/en/glossary#flood-light)[Ambient temperature rating](https://www.xingguanglightingcn.com/en/glossary#ta-rating)

![Floodlight FL-160](https://www.xingguanglightingcn.com/assets/img/prod-fl160.webp)

### [Floodlight FL-160](https://www.xingguanglightingcn.com/en/products/floodlight-160)

Flood

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[All specification pages](https://www.xingguanglightingcn.com/en/spec/)