Those rope lights, effectively mounted, can really be nice. However, having around 215 linear feet of around the wall benchwork it seemed a little daunting to install that much rope lighting so I simply use L.E.D. head lamp and occasionally a fluorescent work light.
Plus the fact that the underneath of my layout is not a dark solid deck island but mostly 3(+/-) foot width, 42" high avg. of free standing cantilevered legless benchwork /shelving in a brightly illuminated basement.
26 watt.