"Light roast" refers to a type of coffee that is roasted for a shorter amount of time, resulting in a lighter color and milder flavor compared to darker roasts. Full definition
Our medium roast coffee is less grainy than light roast coffee and has a balanced flavor, aroma, and acidity. (ptinto.com)
Some studies suggest that dark roast has a better effect than light roast on antioxidant capacity in those who drink it. (wp.med4health.com)
The coffee sack (similar to the French press and other steeping methods) extracts more oils from dark roasted seeds; the percolator and espresso methods extract more oils from light roasted seeds: (kona-coffeebeans.com)