These lightbulbs had a big impact on the brightness in my daughter's room. There are only three lightbulbs in her ceiling fan. I replaced the standard 40 watt candelabra bulbs with three of these and it looks like we added an extra light to her room. The candelabra overlays above each bulb don't match, so we had to ditch them to make the space even brighter; That was the original intent, so it worked. I'm not usually interested in fluorescent lighting, but this was definitely the best option for us.