I started out with digi and now only use magnetic. I think a lot of this has to do with power source. First of all i will always run 240 from now on. When i had digis on 120 they still got hot and the bulbs were more orange than bright yellow. Arguably on 240 everything is going to run more energy efficient. Must remember anything being run more than 3 hours is continuous load and must be taken into equation.