---
title: How does supplemental lighting affect greenhouse temperature and humidity?
description: When considering supplemental lighting in a greenhouse, it is important to evaluate its impact on temperature, humidity, and other environmental factors. Traditional High-Pressure Sodium (HPS) lights
---

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# How does supplemental lighting affect greenhouse temperature and humidity?

When considering supplemental lighting in a greenhouse, it is important to evaluate its impact on temperature, humidity, and other environmental factors. Traditional High-Pressure Sodium (HPS) lights generate significant heat, which can be somewhat beneficial during cold winter months but is an inefficient heating method compared to using a boiler. In contrast, excessive heat can be problematic in many greenhouses, making HPS lights less desirable due to their high heat output. Light-emitting diodes (LEDs), on the other hand, produce substantially less heat—about half that of HPS lights—reducing the heat management issues. However, it remains essential to calculate the BTU load to determine the necessary air conditioning or ventilation requirements. This evaluation is typically integrated into the overall environmental management strategy for the greenhouse.

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