Converting Lifespan Hours to Years

By falyn_eaden

With all of this talk about lighting technology and lifespan in the form of hours, there can be some confusion regarding just how much that can benefit you. In this blog we will focus on lifespan in hours, and how that applies to your application. Once you begin to understand the terminology and units of measure, it will be that much easier to make the right decision for your project. Below are two tables that express how long a lightbulb with a particular lifespan will last if used a certain amount of hours per day. The first table illustrates the lifespan based on being used 5 days a week. The second illustrates 7 days a week. This is what a lightbulbs lifespan really looks like. Here’s the formula to convert lifespan hours to years:

Lifespan Hours
(Days of Week) x (Hours a Day) x (Days a Year)

*Each number is approximate (Rounded to the nearest year).

Days a Week
Hours a Day
25,000 hrs
35,000 hrs
50,000 hrs
100,000 hrs
 
8 hours
12 years
17 years
24 years
48 years
 
12 hours
8 years
11 years
16 years
32 years
5 Days
16 hours
6 years
8 years
12 years
24 years
 
20 hours
5 years
7 years
10 years
19 years
 
24 hours
4 years
6 years
8 years
16 years

Days a Week
Hours a Day
25,000 hrs
35,000 hrs
50,000 hrs
100,000 hrs
 
8 hours
9 years
12 years
17 years
34 years
 
12 hours
6 years
8 years
11 years
23 years
7 Days
16 hours
4 years
6 years
9 years
17 years
 
20 hours
3 years
5 years
7 years
14 years
 
24 hours
3 years
4 years
6 years
11 years

Now you can get a more practical idea of how long your light bulbs should last. It is important to use this information to your advantage. These tables are meant to be referenced for all types of bulbs. Using this table you can look at different lighting options side by side, and determine which one works best for your application needs. For more information on specific types of lightbulbs visit HomElectrical.