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Think a lot of it depends on the lake and the fishing pressure on them. Have a couple of lakes that get fished heavily (families and kids) and they catch many dinks with enough OK ones to keep them coming back, all day right up to dark. Virtually everyone leaves at dark, a half hour or so later, and for about an hour the big boys show up (or at least open their mouths). We can pick up a dozen or so 8" - 9" 'gills (<6" to maybe 7" during the day) during that time simply going from abandon hole to abandon hole, fishing them for only a minute or so working the water column rather quickly. With a full and new moon the time lengthens and they are more aggressive. Seems when we catch a few at a certain depth the rest will be at that level also. Have tried it on some other lakes close by and virtually identical yet it doesn't work at all. Only thing I can say is try it, there may be a hidden gold mine there.