A 45-minute session during which you relax under a blanket of lights at Rescue Spa in Flatiron is meant to speed up circulation, even skin tone, reduce both puffiness and bumpiness, and give you an overall glow that adds to your wow factor on the beach. It also has a side effect of easing muscle inflammation, so your strut will be a bit bouncier. Rescue owner Danuta Mieloch recommends leaving with a Tri Light Body Sculpt Fit , a new at-home device that uses LED lights along with heat and microcurrent to extend the treatment’s benefits. “It allows you to really work on areas that are problematic for you,’’ she says.