Are persistent but non-drenching night sweats consistent with lymphoma? wake up most nights with mild sweating on brow and in creases of elbows & knees. i've taken my temp when this happens amd it's always normal?

No, it isn't a common manifestation of lymphoma. Most of the time, night sweat is idiopathic and benign but people are always worrying about the worse scenario. Certain drug can have night sweat as the side effect. To get rid of your concern, see your family doctor and have a basic blood test done then you can be rest assured - https://www.healthline.com/health/what-causes-night-sweats-in-men

If you do not have enlarged lymph glands and have not lost weight, it is unlikely that you have lymphoma. Try using a fan in your bedroom.