The Thermo Scientific Drosophila Incubator 3990FL features a spacious 19.5 cu ft interior space with LED lighting that is specifically used for the rearing of fruit flies and operates within a temperature range that they prefer. With Peltier Cooling Technology that is more energy efficient using 75% less power than units that use a compressor, the need for a refrigerated compressor is eliminated consuming less power while reducing laboratory ambient temperatures and air conditioning loads, also excluding the need for heating coils. Using excellent temperature uniformity that allows for effective space utilization, ussable capacity basically doubles while insuring that all shelf areas are maintained at the proper temperatures as compared to other compressor driven incubators on the market. Using no refrigerant gases, this is a greener product with the service life extended with no impact from projected changes for the refrigerants. The heavy duty shelves have a 75 pound capacity eliminating sagging and includes 1 pull out. The 3990FL also includes a programmable Watlow controller, RS 485 Interface, independent over temperature thermostat, over temperature alarm, a 1 Year Manufacturer's Parts and Labor Warranty and a 2nd Year Manufacturer's Parts Warranty.