Inert gas Inert gas An inert gas/noble gas is a gas which does not undergo chemical reactions under a set of given conditions. The noble gases often do not react with many substances, and were historically referred to as the inert gases. Inert gases are used generally to avoid unwanted chemical reactions degrading a sample. These undesirable chemical reactions are often oxidation and hydrolysis reactions with the oxygen and moisture in air. The term "inert gas" is context-dependent because several of the noble gases can be made to react under certain conditions. Purified argon and nitrogen gases are most commonly used as
Phase-out of incandescent light bulbs potentially visually-obstructive snow and ice on warning lights and signs. The heat is also used to melt the wax inside lava lamps. Some CFLs may not be compatible with existing dimming circuits such as those using TRIACs, although more dimmable CFLs are expected to become available as the phase-outs continue. Mains voltage halogen bulbs provide a somewhat more efficient dimmable alternative to common incandescent bulbs and are readily available, although they too will be phased out in the EU from September 2018. Dimmable LED lamps are available from several vendors, although not all LED lamps are compatible with dimmers and