The goal of any diet is always to keep as much LBM as possible while losing fat, so be sure to make your nutritional adjustments slow and steady, and keep very detailed data of your weight. Aiming for no more than 2lbs per week loss should allow you to keep most of your strength.
Most folks take in more protein than needed, so if you're protein right now is 1.5g per pound or higher, you can try lowering it to 1.2 or so and that will leave more room for carbs.
Overall, to just pick a number of carbs and say "try 150g carbs per day" over an internet forum isn't really possible. Everyone is different in terms of what they can handle, insulin sensitivity, etc. Some guys can diet on 250-300g carbs, others need to go lower. I'd recommend taking your current maintenance cals and starting by reducing calories by 10% to start, and add some conditioning/cardio a couple of days a week. Protein at 1.1-1.2g per pound, calculate your fat intake (be sure to keep enough healthy fats in there) and whatever is left you can fill with carbs. Start by focusing your carbs around your workout window, whatever is left have at breakfast, and anything left after that you can divide how you like.
Most importantly, realize that if your goal is to cut, then that should be your priority. Of course you want to keep your lifts and strength up as much as possible, but if your MAIN goal is to cut, you need to be ok with the possibility of losing a little bit of strength. That being said, since you're only losing 10-15 pounds, I don't think you should notice any significant decrease in strength IF you program your diet correctly.