I must agree with
@FrodoOne in fact with G9 bulbs I found local sourced bulbs were useless. The
large bulb to left, technically did not comply with UK rules, there was no lumen marked, no watts marked, however 4 out of 5 worked A1, the 5th I took apart to see how they worked, very simple, a capacitor used as a volt dropper, then full wave rectified, into an electrolytic capacitor nearly as big as the whole of bulb to right, to the LED's and a small leak off resistor. I also found a dry joint, corrected, and reassembled, been running now some 3 years.
Main point the bulb to left worked A1, the covers would not fit, but they worked. The bulb to the right had a shimmer when on, and would not switch fully off, but covers would fit over the bulbs.
As
@AndyPRK says, one quartz halogen mixed with the small LED bulbs worked, even with 230 volt bulbs. The G4 are 12 volts, so would need a transformer, there are in general two types, toroidal transformers
have only a maximum output, but the electronic transformer
often have a range one shown 20–60 VA, so the lamps must total over 20 watt and under 60 watt, newer models
have 0–50 VA again as shown, these work similar to the toroidal transformers, except the output in not 50 Hz but in the MHz range, this can if the cables are too long produce RF interference, and it could react with the electronics of the LED bulb, but normally are OK.
To me the problem is until you try you simply don't know what will work. I have a draw of new bulbs which have not worked, so changed, the quartz G9 came in packs of 10, and I have the small ones which came with the chandelier, I have packs of 10 bulbs bought from Tesco while we could still get tungsten pearl bulbs, I should dump them, unlikely to use them.
It is not helped when the package has a large wattage in equivalent, but the real wattage is in small print.
