Aug 30, 2026
Behind the 2700K decision: why our default is warm
Cool white sells better in a search grid. We still ship 2700K as the factory default — here is the data behind that choice, and where we make an exception.
Search a marketplace for “LED light bar” and the thumbnails look blue. Cool white photographs as crisp and modern, and in a small grid image it reads as brighter. There is a commercial argument for defaulting to 5000K, and most sellers take it.
We default to 2700K anyway, for three measured reasons.
First, return rate. Across 1.4 million units, the return reason “too blue / too harsh” accounts for 0.37% of warm-default SKUs and 2.9% of cool-default SKUs in the same housing.
Second, skin and food. At 2700K with CRI 92, a plate of food photographs the way it looked when you cooked it. At 5000K the same plate reads slightly grey, which is fine for a workshop and wrong for a dinner table.
Third, evening physiology. Light above roughly 4000K in the two hours before sleep suppresses melatonin more strongly. A kitchen bar that stays on until 10 p.m. is part of that window.
The exception is the task setting: our bars include 5000K because cleaning a stove or reading a recipe genuinely benefits from cooler, higher-CCT light. Three temperatures in one fixture is how you get both without choosing.
— DWEPTU product team
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