I have installed recessed fluorescent lights in a Muti-family complex. (the fixtures ARE NOT covered with insulation). The fixtures are equipped with 1/26W fluorescent lamp and ballast is rated for use in both 120v and 277v operations. The sockets of the fixtures are from Leviton, the ballast is from Universal, and the lamp is from GE. I have installed the fixture however after two weeks the sockets keep melting. I have sent the fixture to a lab for independent testing but the test lab says there is nothing wrong with the fixture. I have tried troubleshooting the site but come-up empty handed. Does anyone have an idea of what can be the possible issue?