I have my 50 watt halogen bulbs replaced by this. As expected, a slight reduction in luminosity to determine, but is clear, though, switching to a 40 watt equivalent. But the bulbs are defenitiv a worth buying. From the light output produced, I can not complain not one bit, the hall is bathed in a bright, pleasant light. It can be seen even when the lamps look at itself more closely that they are LEDs. I could already see the more expensive competition and am really amazed that these bulbs can keep more than just loose. Of course, it is now first wait until they have shone 50,000 hours, but by then I will stay at an absolute buy recommendation.