Ok that website is very one-sided simply saying it's illegal and is acting to spread fear, now what is the penalty ? Before people go and chain yourself to a light post, only to become mosquito food you should look at the law the actual law, 2016 Arizona Revised Statutes Title 49 - The Environment § 49-1104 Use of mercury vapor light fixtures, on the governments website .. It actually is a very simple law which reads
"A. No new mercury vapor outdoor light fixtures shall be installed after the effective date of this section. No replacement equipment other than bulbs for mercury vapor lighting fixtures shall be sold in the state after January 1, 1991 and the use of mercury vapor light fixtures is prohibited after January 1, 2011.
B. The provisions of this section shall not apply to outdoor light systems erected prior to 1950."
So first of all when did you put the light up it might not apply to you..
Do you use a timer to turn them off at midnight ? because there is § 49-1103. Nonconforming light fixtures it reads
"In addition to other exemptions provided in this article, outdoor light fixtures not meeting the provisions of this article shall be allowed provided such fixtures are extinguished between the hours of midnight and sunrise by an automatic shutoff device."
Now to top it all off, you can now unlock your chains and go inside to get away from the bugs and to warm up and grab a coffee, there is no Penalties, they will simply educate the light owners and show you the benefits of compliance to the wildlife and other activities that need and enjoy a dark-sky environment, humans are not the only thing living on this planet..
Please don't use this info to simply think you can skirt the intent of the law, because the more issues of non-compliance the more likely a legislator is to introduce penalties in the future or other more draconian measures or laws, be neighborly and follow the laws, and it'll also reduce the odds of an annoyed neighbor taking measures in there own hands, which almost always never ends well for either party involved, I've seen several light fixtures taken out by marbles or a 22 and people don't know why, and the first thing I ask them is have you talked to the people over there who probably can't sleep at night because of a new 1000 watt HPS pointed at there bedroom window, and the answer is always, ALWAYS, NO, and because people tend to shy away from confrontation a sling shot and a marble resolve the issue in the dark at he fixtures expense, also something a state legislator might be trying to avoid..
Look at Chapter 7 :>
http://www.azleg.gov/arsDetail/?title=49