---
title: "Xingguang | C5-M Floodlights | LED Lighting"
description: "On coastal projects the failures are almost all in the fasteners and the coating, not the LEDs: ordinary zinc-plated screws seize within a year in salt fog and cannot be removed. Asking about screw grade (304 or 316) and coating build matters far more than asking about IP."
url: "https://www.xingguanglightingcn.com/en/spec/coastal-corrosion-resistant"
lang: "en"
updated: "2026-10-28"
markdown: "https://www.xingguanglightingcn.com/en/spec/coastal-corrosion-resistant.md"
---

[Home](https://www.xingguanglightingcn.com/en/) / [Selection by specification](https://www.xingguanglightingcn.com/en/spec/) / C5-M Floodlights

# C5-M Floodlights

On coastal projects the failures are almost all in the fasteners and the coating, not the LEDs: ordinary zinc-plated screws seize within a year in salt fog and cannot be removed. Asking about screw grade (304 or 316) and coating build matters far more than asking about IP.

[Get a Quote](https://wa.me/8613809877696)

## Key parameters

| Power | 100–200 W |
| --- | --- |
| Luminous flux | 12,000–25,000 lm |
| IP rating | IP66 |
| Operating temperature | -20 … +45 ℃ |
| Corrosion class | C5-M |

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

## Environment is not only about water

What actually kills fixtures on site, in order of how often it happens: ① heat — every 10 ℃ of chamber temperature roughly halves driver life; ② corrosive gas or salt fog — it eats the screws and the coating first and enters through the seam afterwards; ③ dust — it blocks the fins, which is heat again; ④ cold — capacitors struggle to start and plastics go brittle. IP covers only the water part.

So the order of questions should be: what is the ambient temperature, is there a corrosive medium, how is dust cleaned, what is the minimum temperature — and IP last. Reverse the order and the fixtures start failing three months in, with a perfectly adequate [IP rating](https://www.xingguanglightingcn.com/en/glossary#ip-rating).

## How to check the temperature item

This page is rated -20 … +45 ℃. Note that this is the **ambient temperature the fixture tolerates**, not the body temperature — the two differ by the temperature rise. What the driver sees is ambient plus rise, and the rise comes from heatsink area: same wattage, different construction, 20 ℃ apart.

The check is simple: ask for the driver model, then read its derating curve at the actual chamber temperature. A quote that cannot produce that curve has not answered the temperature question, whatever the ℃ figure says.

## 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

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

## Need a Lighting Plan?

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