Downlighter fitting

[Stephen]

I've installed a nummber of 50W downlighters in my plasterboard ceiling, nut they keep popping out. I drilled holes of the exact size specified in the instructions with no problem. What I don't understand is how the spring clips are supposed to work - given that they are mounted at a greater distance from the downlighter front flange than the thickness of the plasterboard (13mm). They just sit there in mid-air when viwed from above the ceiling (I can see their reverse sides from the loft). I've made sure they are attached per instructions aand not upside down but it just doesn't seem to make sense. Can anyone help ? Thanks

[TonyB]

Its no help but mine do that too, although they don't pop out.

TonyB

[Paul Saunders]

On the spring clip is a long and a short part at right angles to each other. Point the long part up when fitting the lamp so the short part sits under the ceiling (between the ceiling and the fitting) when you push the fitting into the ceiling you should feel some resistance as the spring pivots. The long part then should be sitting on the top of the ceilng and the short part will be sitting agains the edge of the plasterboard.under tension keeping the fitting in place. Sounds more complicated than it actually is.