You've mentioned them before, but it wasn't clear to me what defines a "north light", seems it's the combination of colour temperature and CRI, according to this
Some of the tubes sold as north light seem to say 860 or 865, others say
965 which includes UV, are you sure your workshop isn't a tanning studio :-)Just checked one of the tri-phosphor tubes which I find nice and 'crisp' in the garage they are 840 (I thought they were called daylight white, but I guess they are cool white really.
depends if you mean 860 or 965 I guess, if the former yes, the latter seems to be fluoro only.