---
title: "Xingguang | 240W High Bay Lights | LED Lighting"
description: "240 W is the economical answer above 10 m: past that height, adding fixtures costs more than adding wattage. The failure mode at this size is almost always thermal — with too little body area the driver chamber runs 25 ℃ above ambient, life halves, and nothing shows on the illuminance table."
url: "https://www.xingguanglightingcn.com/en/spec/high-bay-240w"
lang: "en"
updated: "2026-10-28"
markdown: "https://www.xingguanglightingcn.com/en/spec/high-bay-240w.md"
---

[Home](https://www.xingguanglightingcn.com/en/) / [Selection by specification](https://www.xingguanglightingcn.com/en/spec/) / 240W High Bay Lights

# 240W High Bay Lights

240 W is the economical answer above 10 m: past that height, adding fixtures costs more than adding wattage. The failure mode at this size is almost always thermal — with too little body area the driver chamber runs 25 ℃ above ambient, life halves, and nothing shows on the [illuminance](https://www.xingguanglightingcn.com/en/glossary#illuminance) table.

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## [Key parameters](https://www.xingguanglightingcn.com/en/glossary#efficacy)

| Power | 240 W |
| --- | --- |
| Efficacy | 135 lm/W |
| Luminous flux | 32,400 lm |
| Maintained flux | 22,680 lm |
| Mounting height | 10–15 m |
| Coverage per fixture | 130–180 m² |
| Design illuminance | 300–500 lx |
| HID equivalent | 600–750 W |

[Product family: High Bay Lights](https://www.xingguanglightingcn.com/en/product-categories/high-bay)

## What the wattage figure does not tell you

At 135 lm/W, 240 W gives about 32,400 lm at the fixture; applying a 0.7 maintenance factor, roughly 22,680 lm reaches the floor at end of life. Layout counts come from 22,680 lm, not from the nameplate 240 W — layout by wattage and the far row always ends up dim.

A second double count: the 135 lm/W figure already includes driver losses. Discounting again by driver efficiency deducts the same loss twice and over-counts fixtures.

## The height and area it actually covers

At 10–15 m and a design illuminance of 300–500 lx, one 240 W fixture covers about 130–180 m². That range is back-calculated from the maintained 22,680 lm, not the initial output — lay out on initial [lumens](https://www.xingguanglightingcn.com/en/glossary#lumen) and the site is under-lit well before the first relamping cycle.

If the existing HID is 600–750 W, 240 W lands in the same bracket: comparable flux, roughly a third of the power draw, and the circuit and switchgear usually carry over. What to re-check is inrush current and the earth-leakage setting.

## Four things to verify before ordering

① Whether flux and efficacy are quoted for the complete fixture or the light source — a 10–15% difference that changes the fixture count. ② Whether colour temperature 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

[High bay](https://www.xingguanglightingcn.com/en/glossary#high-bay)[Ambient temperature rating](https://www.xingguanglightingcn.com/en/glossary#ta-rating)[Lumen maintenance](https://www.xingguanglightingcn.com/en/glossary#l70)

![LED High Bay HBL-048](https://www.xingguanglightingcn.com/assets/img/prod-hbl048.webp)

### [LED High Bay HBL-048](https://www.xingguanglightingcn.com/en/products/high-bay-light-048)

200W

## Need a Lighting Plan?

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