I have a Tourmaster liner @ 76 watts and Gerbings T5 gloves @ 27 watts. 103 watts at 100% power, 100% of the time. A newer electronic controller on low means you are probably only drawing ~34 watts continuous. I would not worry too much about using them on the R65. Keep the revs up and should be no problem. In fact I have wired my Kubota tractor so I can plug in while pushing snow.... and the R65 alternator puts out probably 3 times the wattage (280) as my Kubota!
P.S. Rode my GS 230 miles yesterday in 35-40 degree temps with 30 mph gusting cross winds and I doubt I ever had my controller over 50%. No worries. Go ride and enjoy, put it back on the battery tender when you come home.