One of our interns here at the Kansas Energy Program occasionally drives to local stores in Manhattan, Kansas (Home Depot, Menards, WalMart, and Target) and gathers all the information he can find on 60 watt-equivalent LED bulbs. While K-State makes no manufacturer- or store-specific endorsements, we do rank these bulbs in order of efficiency. This efficiency, known as luminous efficacy, is a measure of lumens per watt, which is how much light the bulb produces for each watt of energy it consumes. There are other factors to consider of course, such as bulb life, warranty period, cost, color temperature, etc. The top-ten table is below, or you can download our full list with additional details in Microsoft Excel format (last updated 10/17/2017).
|Yearly Cost *||Life *
* All bulbs should be rated based on usage of 3 hours/day at a cost of 11 cents/kWh.