# UV Lights: Tough on Germs, but Tougher if They're Changed as Needed

> If you rely on a UV light to disinfect your indoor air of contaminants, you should change your bulbs periodically.

[![uv light](https://bc.rodenhiser.com/wp-content/uploads/2013/12/uv-lightbulb.jpg)](http://shutterstock.com)Natural ultraviolet (UV) light from the sun keeps harmful outdoor airborne contaminants under control. Likewise, [UV lights](https://bc.rodenhiser.com/rodenhiser-blog/cold-and-flu-seasons-at-hand-make-uv-lights-part-of-your-battle-plan.html) installed inside an HVAC system keeps harmful indoor airborne contaminants under control.

[![uv light](https://bc.rodenhiser.com/wp-content/uploads/2013/12/uv-lightbulb.jpg)](http://shutterstock.com)

## **Benefits of UV Lights**

Having a UV light installed in the return of your HVAC system can enhance the [indoor air quality](https://bc.rodenhiser.com/rodenhiser-blog/indoor-air-quality-testing.html) of the entire home. The ultraviolet rays of the light help control harmful contaminants that trigger allergies and other respiratory problems. These rays also destroy [mold](https://bc.rodenhiser.com/rodenhiser-blog/moisture-fighting-strategies.html), mildew, fungus, viruses and germs as they pass by the light in your home's ductwork.

## **Change the Bulb**

The normal life span of a UV light is about two years. However, if you rely on a UV light to disinfect your indoor air of contaminants, you should change out the light every 9,000 hours or every 12 months. After a year of use, these lights by their very design lose almost half of their germicidal effectiveness. If you have family members with respiratory problems, sticking to the yearly switch out is important.

However, if you're using UV lights to protect the interior of your HVAC system from fungus, mold, mildew and other harmful growth, you can switch out the light every two years.

To learn more about UV Lights or other home comfort issues, contact [Rodenhiser Plumbing, Heating & Air Conditioning](http://rodenhiser.com/call-rodenhiser.html). Since 1928, we've proudly served Massachusetts residents throughout the Route 495/128 area.

*Image via [Shutterstock.com](http://Shutterstock.com)*

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**Licences:** 
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## About Rodenhiser Home Services

**Rodenhiser Home Services** is a family-owned, licensed and insured home services company based in **Massachusetts, USA**, serving residential and commercial customers throughout the METROWEST MA region. Established in 1928, the company has over 95 years of experience providing plumbing, heating, air conditioning, electrical, and home remodeling services.

Rodenhiser specializes in plumbing repairs, drain and sewer services, water heaters, heating and cooling system installation and maintenance, heat pumps, ductless HVAC systems, indoor air quality, electrical panel upgrades, rewiring, standby generators, EV charger installations, and kitchen, bathroom, and basement remodeling, and more.

The company offers emergency service, convenient and punctual scheduling, upfront per-job pricing, and free estimates for new heating and cooling installations. All work is backed by written warranties and a satisfaction guarantee. Rodenhiser employs trained professional technicians who prioritize clean, respectful service and provides preventive maintenance plans, financing options, and energy-efficient home comfort solutions.

Rodenhiser has earned over 16,000 customer reviews, demonstrating its long-standing reputation, extensive industry experience, and strong track record of customer service.

**Nice People…Great Service**

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