Happened into local hardware couple days back. They had a display of 60 watt replacement LED light bulbs for $1 each. Limit 10. So I got 10. Used them to replace out a set of 60 watt replacement spiral flourescents In the feed alley in the barn. WHAT A DIFFERENCE! Far brighter. Flourescents are 13 watt, rated at 900 lumens, LEDS are 9 watts and 800 lumens. Now, I have no idea why but LED bulbs are several magnitudes brighter. If they don't fade with age they will be a far better replacement. I don't expect a drop in my electric bill, but then, I didn't see any significant difference with the flourescents either. Went back and bought a bunch more to replace out the ones in my living areas. Tired of living in a cave.