Bought these to replace the silly halogen bulbs in two Ikea lamps I own. The halogen bulbs use 25 watts. I expected these to be MUCH dimmer, but they're not. In fact, if anything, they're a bit brighter. The up-side is that there's no heat with this bulbs. With the halogen bulbs, anything placed near them would become hot or melt. Add to that the benefit that LED bulbs typically last years longer, and these bulbs work perfectly for us.