Belmo... lighting is something I am extremely familiar with. I would not replace those bulbs like that. I would install new LED fixtures. Very simple and can be done in about 3 minutes each.
You also need to make sure you are selecting the right color temperature. I would recommend 3500k for your kitchen.
Do you have a dimmer switch on those lights now? If you do, you will likely need to replace it and get an LED dimmer that is compatible with the fixtures/bulbs. Otherwise, you may get some buzzing or humming.
The initial cost on the LEDs is more than other bulbs or fixtures but they use 80% less energy and also last about 50,000 hours so they will eventually pay you back.
* Those halogens you have are extremely hot.