Lucubration

lucubration \ˌlü-kyə-ˈbrā-shən, ˌlü-kə-\ noun: 1. laborious or intensive study, 2. (usually used in plural) the product of laborious or intensive study

Etymology: Latin lucubration-, lucubratio study by night, work produced at night, from lucubrare to work by lamplight; akin to Latin luc-, lux light

Don’t confuse this word with lubrication.