Used as a replacement for a 2.4w bulb in my Busch and Muller front light as powered by a shimano hub dynamo that also powers a rear light with standlight. Following frequent blow-outs of the 2.4w bulb (especially in the wet) I was advised by Busch and Muller to upgrade to the higher wattage even though it is not normally recommended for dynamo set-ups with a standlight. The 3.0w bulb lasts much longer and is noticeably brighter.
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