The Electricity Laboratory has indeed achieved remarkable results in the past five years, but whether it is the electric motor or the carbon filament light bulb, the related theories were proposed by Carlo.
This makes Graham deeply admire Carlo, even considering him a born scientist. If he hadn't become the King of Spain, Carlo would definitely have become one of the greatest scientists in human history, perhaps achieving greatness comparable to being a king.
Unfortunately, having become the King of Spain, Carlo clearly doesn't have much energy to devote to scientific research and development, which makes Graham, who admires Carlo greatly, feel regretful, believing that humanity may have missed out on a great scientist.
Upon hearing Graham's introduction, Carlo nodded with a smile and asked his question: "Mr. Graham, can the lifespan of this carbon filament light bulb currently be guaranteed to exceed 300 hours?"
