Until now we used mercury lamps, but this time I changed it to LED. Even though the strength of light is no problem, I was surprised at the cheapness of the electricity bill. One year has passed after the exchange, but it continues to shine smoothly.
It was brighter than I thought it was good. Moreover, it can be shared between the hall and the outdoor as 100 V to 220 V, convenience is good. There is also a thing called LED, it does not get so hot, it is convenient to use for detailed work at hand. The price is also affordable.