
I have a front door patio light that uses two standard 100w tungsten bulbs connected in series so they give a much softer glow and at a lower operating voltage (60v) 'forever' " keep. instead of 120V - the old porch trick and the like). I replaced them with two 5W dimmable LED bulbs and they worked great, running at almost their full 400 lumens despite the reduced individual 60V voltage on each bulb and only consuming 5W due to the series connection. Also the bright yellow-orange light looks much better than the old standard tungsten bulbs. Conclusion: brighter and nicer light, 5 watts instead of 100. No problem leaving it on all night and the bulbs don't burn out for years. I love LED lamps.