These DryConn waterproof connectors are the industry professionals choice for wire nuts.  They continue to be the most popular brand of waterproof connectors for 12 volt light year after year.  They are corrosion and waterproof made especially for 12 volt landscape lighting.   The medium size wire nut fits most lighting applications.  The large size is for accommodating heavy gauge cable situations.  They feature a rating of 221 degrees Fahrenheit and a silicone sealant temperature range of -45 F to 400 F.  Above all they are easy to install and will stand the test of time.