Weight watchers smart ones are 220 calories. Maybe give them a try.
I have a friend who eats very healthy who eats Lara bars, and I'm about to try them. The label looks as though they have some decent nutrition in them. I bought two of the Uber varieties: the Roasted Nut Roll and the Cherry Cobbler. Sugar is fairly low in those. They were on the shelf at WalMart, in the grocery section..
Agree with Barb135, 100 to 200 calories is a snack. For my own snacks, I use a piece of fruit, some cut-up raw veggies, a cheese stick, a cup of low-fat yogurt, or a 100-calorie pack of Emerald-brand almonds. You do have to prep the veggies at home and put them in a plastic bag to take with you. The other items can be store-bought and are ready to eat. For the yogurt, you need to remember to bring a spoon. If you end up getting serious about this, you will probably buy an insulated lunch pack and some "blue ice" containers to keep things cool. Today, I brought to work a peach for my morning snack and a piece of leftover cooked chicken breast for my afternoon snack. I used the lunch pack and the blue ice, since I brought the chicken from home. Keep the fridge stocked with things you can grab on your way out of the house, whether you use a lunch box or not. Another thing you can use, if you keep it cool, is a hard-boiled egg.
"Meals" should be at least 300-400 calories, each, with snacks from 100-150/ea.
Unless you plan to "graze" all day, it sounds like you are planning WAY too few calories/day.
If you want to be more specific (how old are you, how tall, your current weight, how much you want to lose, goals, etc), we can better answer your questions.