The smart bulb market continues to get more and more crowded, but TP-Link thinks there's room for another device: the Kasa Filament Smart Bulb, to be specific, which we've been testing to see ...

Born in Sunderland, he studied chemistry and moved to Tyneside where, after many years of persistent effort, he created the first successful 'incandescent filament electric lamp' - the light bulb.