We have over 20 years experience of fitting ceiling panels and in that time we have only had three occasions where the lights have generated excessive temperatures which have caused the panels to degrade – each of these utilised halogen bulbs which is why we now recommend the use of LED bulbs which generate hardly any heat.
The first instance was where a customer fitted the lights in a room with an attic space above. The attic was lagged and the lagging was placed on the back of the lights so that there was no ventilation space behind the lights.
The second instance occurred when bathroom rated spotlights were used which were fixed to the surrounding flange (as opposed to the pivoting kind that only touch the outer flange at the pivot points – as seen in the kitchen installation below). The flange is the only part of the light in contact with the panels and temperature generated by these lights caused the ceiling panels to degrade and melt slightly where the flange made contact with the panels.
The third instance involved a firegauard light design which had halogen bulbs. The solid construction of the flange/casing meant the heat was transferred directly to the panels and caused them to warp.
All of these issues would not have happened if LED bathroom lighting had been used as they generate hardly any heat – they are also extremely efficient and are now readily available from most electrical suppliers.