The rule of thumb is dark colors on overcast days, bright colors on bright days but I don't think time of day or point of the season matters much. I've had Moonshine glow spoons get hit early when its dark and at noon pulling lines. I've had hot spoons stay hot through the whole summer and others that were on fire around Memorial day that couldn't buy a hit after the 4th of July. Put something out a few times. If it gets hit keep it out, if not then run something else.