60 lumens per watt is hard to find; make sure you're considering bulb longevity and warranty because those bulbs are pricey upfront.
I'm a fan of the C.Crane GeoBulb, and the lighting products from EarthLED.
Both C.Crane and EarthLED have given me great service. Go for the bulbs with the SuperBright LEDs, not the ones with multiple panels of lights. I've found the latter to prematurely fail more often than the former.
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When we try to pick out anything by itself, we find it hitched to everything else in the universe. John Muir
"Price is what the person pays. Cost is what society pays, here, now, elsewhere and into the future." Natural Capitalism
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