Gas-discharge lamp they create light from electricity considerably more efficiently than incandescent light bulbs. The father of the low-pressure gas discharge tube was German glassblower Heinrich Geissler, who beginning in 1857 constructed colorful artistic cold cathode tubes with different gases in them which glowed with many different colors, called Geissler tubes. It was found that inert gases like the noble gases neon, argon, krypton or xenon, as well as carbon dioxide worked well in tubes. This technology was commercialized by French engineer Georges Claude in 1910 and became neon lighting, used in neon signs. The introduction of the metal vapor lamp, including
Phase-out of incandescent light bulbs electricity savings would pay for the initial cost of CFLs four times faster than in Vancouver, where incandescent lighting contributes to space heating. In all climates, there is a net cost saving from changing to compact fluorescent lighting. The cost of CFL and LED bulbs has declined greatly since 2008, which shortens the time needed to pay off their initial cost. While the excessive heat produced by incandescent light bulbs is frequently seen as a drawback, in certain applications it is seen as an advantage. For example, automotive applications in cold climates benefit from the radiated heat as it melts