I suggest you, as the first step, to start with a definition of an efficiency relation. Examples: efficiency=(total emitted energy)/(supply energy) efficiency=(emitted energy in a range of frequencies)/(supply energy) efficiency=(emitted energy in a range of frequencies and over a solid angle)/(supply energy)
Springdale, AR Lowest Regular Gas Prices Summary. There are 28 Regular gas price reports in the past 5 days in Springdale, AR. The average Regular gas price in Springdale, AR is $2.12, which is $0.29 lower than U.S. national average Regular gas price $2.41. The lowest Regular gas price is $2.05 of Murphy Express located at 7250 W Sunset Ave, Springdale, AR 72762.
The cheapest gas prices were in South Carolina for the second year in a row with an annual average of $3.24 per gallon. The next cheapest states included: Mississippi ($3.28), Tennessee ($3.29), Arkansas ($3.29) and Missouri ($3.29). There were 30 states with an annual average below $3.50 per gallon in 2013.