LED Refrigeration Display Lighting - CoolFit™ We, LeKise, provide solution for our retail customers to help them achieve greater cost savings and stunning refrigerated beverage cooler product display. With LeKise CoolFit™ Refrigeration Display Lighting (RDL), LED light that you can finally replace the inefficient power consuming fluorescent tubes in your commercial refrigerator/cooler. CoolFit™ tube is an IP65 designed RDL standard length which fits into standard fluorescent housing. CoolFit™ fits well with universal AC voltages and provides close to real color optimum lighting without the glare.