Light and gentle stretching means that the tension you feel on your body when completing a stretch should be mild. Relaxed and light stretching should feel pleasurable.
Long-hold stretching refers to holding the stretched position for at least 60 seconds to get maximum relaxation from your muscles and connective tissues. Holding a stretch for 60 seconds is long enough to allow your nervous system to adapt to the changing muscle length.
Static stretching refers to getting into a stretched position and holding it -- keeping the body under tension while the muscles are stretched. In doing so, the opposing muscle group and the muscles to be stretched will be in a relaxed state. Then slowly and cautiously increase the tension from the stretched muscle group -- holding the position for at least 60 seconds to allow all stretched muscles to lengthen.