We have accustomed to think wattages decide the brightness for your industrial plants for decides, in the past, traditional lamp such as mercury lamp, metal halide lamp and high pressure sodium lamp are broadly used for high bay light. Maybe you installed 400w metal halide lamp in your workshop before, when you look for replacement for led high bay light, you need to confirm how many wattages you need for led high bay light firstly.
Since the lighting technology drive lighting industry to find high efficiency alternatives, LED come fully and much lower wattages led come to replace more and more high wattages hid lights. Nowadays, most good quality led high bay light can reach up to 120lm/w lumens efficiency for explosion proof high bay lighting and 140lm/w lumen efficiency for industrial high bay lighting.
Let us introduce lumens. Lumens measure the visible light from led high bay light. You know led high bay lights are normally used for high ceiling, ceiling is higher, the request for lumens are higher. When you know the height of ceiling of your workshop, you need a standard lumens output, based on the lumens efficiency, then you need know the wattages led high bay light you should get.
Here are some ceiling height, lumens, led wattages information to guide you as below:
|Ceiling Height||Lumen Request||Led Watts Request||HID Watts Equivalent|
|15-20 feet||4.5-6 m||15,000-19,000 lm||100-150w||300-400w|
|20-30 feet||6-9 m||20,000-29,000 lm||150-200w||400w|
|30-40 feet||9-12 m||30,000-39,000 lm||200-300w||750w|
|Over 40 feet||Over 12 m||Over 40,000 lm||Over 300w||1000w|
Thus, what wattages led high bay should you get? Depend on the ceiling height in your installation areas.