I replaced 20 18W 1141 bulbs with these bulbs. The light is comparable (even a bit brighter judging by the lumens, but visually it's not enough). But at about 1/8 the wattage I can now connect more lamps to existing circuits - the 1141 halogen bulbs (and some MR16 spotlights which I also replaced with LED bulbs) had their transformers at full load. I've only used them for a few days so can't speak to durability, but if 25,000 hours is accurate I won't have to worry about replacing them for about 10 years - I've changed the 1141s every 1-2 years . Before.
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