Boston Public Works is the division that probably changed the lights but to get them altered/dimmed, you would most likely need to go through the Public Improvement Commission. My suggestion would be to find a contact for the commission, most likely a clerk or secretary, and ask them what process you would have to go through to get the lights changed. An offhand guess would be that you will need to create a petition, have as many people sign it from your street as you can and then get a hearing in front of the commission. I have worked with many different town commissions and can say from experience, Boston’s are some of the worst to deal with. I wish you luck as the process may be even more involved then my guess.