Disclaimer: "Gas" strains are known for their strong, diesel-like aroma and high THC content; use cautiously, start with a low dose, and consume responsibly, especially if new to cannabis or sensitive to strong effects.AAA+ Northern Lights - 21% THCA couple of hits is all it takes for most patients seeking this strain's powerful body effects, an upbeat mix of euphoria and physical relaxation. Northern Lights is a highly useful medical strain, effective at treating anxiety, pain, and insomnia, as well as lack of appetite.