Check the listing for details. Root Radiance Heat Mat Tray Seedling Propagation Clones OPTIONAL Heat Controller. Condition: New. Listed at 29.50 USD. Root Radiance Heat Mat Tray Seedling Propagation Clones OPTIONAL Heat Controller Root Radiance seedling heat mat warms root area 10 to 20 degrees over ambient temperature, improving the germination process and overall success of seedlings and cuttings. Durable, portable and water resistant, root radiance is ideal for greenhouses, nurseries, and indoor gardens. Includes a 6 foot 120V power cord. LTL Digital Temp Controller - HeatLTL Controls Digital Temperature Controllers can be used to moderate the temperature ranges of various appliances. Digital Temperature Controllers are excellent for controlling heat mat temperatures and thermostats linked to ventilation equipment. Cooling and Heating Controllers both handle up to 1000W, 8.3 amps, and regulate temperatures between 40F - 108F (5C - 24C).Temperature Control Range: 40F to 108F (5C to 24C)Temperature Display Range: 32F to 140F (0C to 60C) Root Radiance Heat Mat - 10''x20.75''Fits (1) 10"x20" propagation tray.Watts: 20WAmps: 0.16amps Root Radiance Heat Mat - 20''x20.75''Fits (2) 10"x20" propagation trays.Watts: 46WAmps: 0.38amps Root Radiance Heat Mat - 48''x20.75'' Fits (4) 10" x 20" propagation trays.Watts: 105WAmps: 0.87amps