I've just replaced 3 outdoor 50w halogens with 3w "warm white" bulbs and 6 indoor similar with 4.5w bulbs. Total cost was about $220. Definitely less bright tha

I've just replaced 3 outdoor 50w halogens with 3w "warm white" bulbs and 6 indoor similar with 4.5w bulbs. Total cost was about $220. Definitely less bright than the halogens, but these are areas that we leave on all night outside or for about 6 hours inside. They're expensive, but I calculate that the outside ones will pay themselves off in about 6 months and the inside bulbs 20 months. This excludes replacing the halogens, which happened relatively often. We still have many other down-lighters indoors, but they're not on very often and need to be dimmed, so I'll wait until the cost drops.