E40 discharge bulb powerball hci t osramthe powerball hci t bulb is a compact discharge bulb which is equipped with the newest burner technology with its round burner a patent from osram it can obtain even better performance compared to the previous cylindrical form in regards to light colour and stability as well as a longer average lifespan of 12 000 hoursproduct advantagesbest colour reproduction and colour stability throughout the entire bulb lifecycle through reduced ageing even m