Most building in modern times have standards in place to aid the containment of fire and reduce the speed of spreading. This is to give the occupants and fire services enough time to react, ensuring safety and hopefully less destruction of property.
Ceilings are often constructed of plasterboard in most domestic buildings. Downlights are often a recessed light that sits within a ceiling, and this requires the cutting of plasterboard. This lowers the time that it takes for the fire to burn through the ceiling to lower dramatically, which is where Fire Rated Downlights are required to help restore the safety as regular downlights are not adequate.
Fire Rated Downlights are a specific type of downlight used to aid the containment of a fire, creating a barrier that is lost when the plasterboard is cut for the fitting. The rating of the light fitting is determined by the time they can withstand the heat of a fire and help prevent the fire spreading. Most ratings are usually 30, 60, or 90 minutes, and are manufactured and tested to maintain a certain standard.
They work by expanding when under intense heat, sealing the gap and making it air tight to prevent the flames from catching the edges of the plasterboard. Fire Rated Downlights are required when installing into a celling that has timber beams and not a concrete or metal upper ceiling.