They give off a nice bright light. I've only had them for a few days so I can't comment on durability. But a word of caution I bought these to replace Bulbrite KX60FR/DC bulbs which are much, much more expensive. The base is identical and fits perfectly. But the lamp is attached to the base with a piece of plastic, making these lamps about 1/4 inch larger than Bulbrites lamps. The particular light I needed them for has two bulbs aligned vertically, one coming from the bottom of the fixture and one from the top. The extra length meant I could only wear one of these. There's enough light for me to live, but I thought it was worth noting that they're longer.
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