Find out what the principles are before beginning your project.
The hire company will often provide you using the legal minimum lights you'll need. You'll probably wish to call around to several companies to get price quotes before you decide to make any selections.
However, the top way to do this isn't necessarily common knowledge. Because coal ash landfills like the Sherco Plant have previously been found by EPA to leak dangerous levels of chromium, other communities near coal-fired power plants could possibly be at risk.