Hi have a new Bosch hqa574bs3b oven and the light has stopped working. It's only a few weeks old! I have called the helpline and they will send a new bulb but surely I can get one in the shops? Does anyone know if this is ok as the Bosch person said I had to use their bulb. Not really impressed with Bosch so far as we had a cooked hood light blown too and had to have a new circuit board. was a new hood too.