Thomas Edison's incandescent light bulb did not exist in the White Abyss. It was never invented in the first place. All technologies pertaining to light, whether it be neon lighting or lamp lighting, were patented and sold by one guild: the Thunderstrike Brotherhood. They were perhaps the only large-scale guild with stores and operations in both the Dark Sector and the remaining Sectors. They were everywhere. Their political outreach, while not on the same level as the Big Three, was certainly climbing up there. Day by day, their engineered magical items grew in popularity and complexity. As the standard of living increased, so did their wealth.
The House of Wisdom was the one place where Dasha could read on the history of appliances and home technology. According to the latest scholar estimations, 32% of homes used incandescent light bulb and were powered by electricity on some level. The remaining 66% relied on magic and magical appliances.