What is 2 facts about oak island lighthouse?

The first 40ft of it is Grey the middle which is 50ft is White and the top 52ft is Black, the final 11ft is glass and aluminum. The colours are not painted, it was mixed in the concrete at the time of building. It is 169ft above water and can be seen for 16 miles, it flashes every 10 seconds, lastly but importantly, it is the most powerful beacon in the world