Can you see that the actual filaments have blown, as I’m wondering if you are getting a poor connection at the lampholder which is getting hot and going high resistance. Take a good look at the wire connections on the blown bulbs, because if either have gone black then it’s a lampholder issue.
Tally100 wrote:Hi , yes I can see the filaments have blown I have a spare 28w g9 but it’s not an oven bulb , should I try that one as well
No, a non-oven bulb won’t last long at all as the heat will kill it. I’d still be taking a careful look at the lampholder to see that the contacts are nice and clean.