I agree w/OwnIt. Make a list of the things that he has taken. Walk around the house and really take notice of your surroundings. I suspect he may have taken more than what you think. MLCers feel entitled and will take whatever catches their eye at the time they are in the family home. I would also suggest that you take photos so that if he returns once again, you'll be able to compare the photos with the actual surroundings. Am I making a big deal out of this? No, I discovered things missing weeks after my xh made visits to the home when I was at work.
Also, MLCers will string you along w/negotiating terms of separation/divorce. Some lawyers have no problems arguing over the small stuff. Lights can be replaced and I know you may feel justified in bringing up issues (little things)...but keep your focus on the big ticket items, i.e., such as finances, your home, child support, the house, etc.
Change the locks (f your state allows it) or get an alarm system. If you already have an alarm system, change the code. If you have a garage w/an automatic garage door opener, change the code or unplug the opener once the door is down. Also, check your computer system to see if he's put any codes in so that he can see what you are receiving and sending remotely. Yes, my xh did this and I was lucky enough that my MIL told me about it.
Please, please do not contact him about missing items and the "estimated worth" of those items. They love attention, be it positive or negative and they will drag things out until you toss your hands up in the air and do the heavy lifting. Leave things be for now and do not remind him that he hasn't served you. I know that this is tough on you, but just leave it be for now. Come here to vent.
Just remember, the more you contact your lawyer about stuff, the more it's wracking up costs on your end. Make your contact w/your lawyer count, i.e., lists of questions and items missing when you do meet will help is cutting the costs of picking up the phone or emailing him/her a lot.