Both the Dixmor & Hamilton are tremendous improvements over the CFL green displays. I would rate the CFLs at a 1 or 2 in the sun, Hamilton at a 7 and Dixmor a 9. Not a whole lot of difference between the Dixmor & Hamilton but I thought it was enough for me to change the one I did because of it facing the South. It seems to be in the sun a lot more.