Like many here, I judge dry prints with Solux bulbs and window light. The original poster, though, asked about lights for judging prints in a darkroom. When I take prints out of the fix and lay them on a glass plate for "wet" viewing, I follow Bruce Barnbaum's advice and use a very low wattage tungsten bulb. It's probably 15-25w, and it's about 2 feet from the center of the print. You don't want a super bright light because you just spent a number of minutes under safelights.
It's my impression that so far the CRIs of LED bulbs are not very good.
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