You gotta try it to see if you like it

First, 4000k bulbs are hard to find. So if that's what you're looking for this is a good value. The color value of these bulbs seems to be accurate. I do not have a device to measure Kelvin temperature but compared to my other 4000k bulbs these seem correct. The bulbs are quite compact and lightweight. If you need to fit a smaller fixture these are a good choice. I measured brightness by placing my light meter on the table below the lamp where I usually read. Comparing directly with the 16 Watt 100-watt equivalent bulbs I normally use, the bulbs registered 26% lux less. If overall brightness matters most to you, you might want experiment with a different bulb. For the cost, however, you cannot go too far wrong with these bulbs.

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