Should 1,700,00 read 1,700,000? Let's assume it does=1.7E6 in scientific notation.
1boe=1.7E6 watt-hrs, so 5E7 boes=8.5E13 watt-hours. A 1-watt bulb would last 8.5E13 hours, so a 60w bulb would be 60 times less=8.5E13/60=1.417E12.
There are 8.766E3 hours in a year of 365.25 days, so the bulb would burn for 1.417E12/8.766E3=1.616*10^8 years!
If 1boe=170,000 watt-hrs then the light bulb could be powered for 1.616*10^7 years, or 16,160,000 years.