When installing with HALO brand 6" LED housing, rotate the clips located inside the housing 180* so the spring wires have room to open propertly, otherwise only one side will hold the module against the ceiling and the other wire will snap off. At first I thought that there was a defect with Parmidas' product. I had to figure this on my own. I wish this tip was included on the installation manual. They work perfect for 5" housings but how often you find customers with those? All I'm saying is Parmidas 6" recessed modules can work just fine with most housings.