I want to know the answer to the following question:
When was electric lighting first installed and used in the store?
All the background I'm provided with is that "Wanamakers was the first department store to offer fixed prices marked on every article and also introduced electrical illumination (1878), the telephone (1879), and the use of pneumatic tubes to transport cash and documents (1880) to the department store business.". Is that enough to answer the question?
Answer: yes