Can Armstrong ceiling tiles support the weight of a small diameter spotlight?
There is no simple answer to this question as it is is very dependent upon the size and weight of the spotlight and the type of tile to be used. Essentially Armstrong tiles are designed to support only their own weight so Armstrong recommends that you conduct a trial, using samples of spotlight and tile, before the installation commences. If the weight of the spotlight causes excessive deflection or damage to the tile, you can consider using a plasterboard pattress laid onto the back of the tile to spread the load back to the grid flanges.