3,000 Lumens from 30 W: What a Floor Lamp's Efficacy Number Does and Does Not Tell a Buyer
Understanding how 3,000 lm and 30 W translate to 100 lm/W board efficacy helps buyers compare LED floor lamps objectively, but only when luminous flux, board power, and dimming range are specified together—without them, the number alone misses critical context for private-label sourcing.
The Anrotix AT03 solid-wood floor lamp delivers 3,000 lm from a 30 W LED board, yielding a board-level efficacy of 100 lm/W—a figure derived directly from its published luminous flux and power draw. This metric reflects the efficiency of the LED package and driver at the component level, not the perceived brightness in a room, which depends on optics, shade material, and mounting height.
Board efficacy is measured under standardized conditions (typically 25°C ambient, steady-state operation) using an integrating sphere to capture total emitted flux before any light loss from the shade or reflector. For the AT03, its metal shade and rotatable head introduce optical losses, meaning the actual lux on a surface will be lower than what 3,000 lm suggests in free space—a distinction buyers must clarify when evaluating real-world performance.
Dimming range is essential context: the AT03 adjusts from 10% to 100% brightness, so efficacy can shift across the curve. At 10% output, the LED may operate less efficiently due to driver limitations, while peak efficacy often occurs near 70-80% drive current. Specifying only max lm and W without the dimming profile risks overestimating efficiency in typical use cases where lamps run below full power.
For private-label buyers targeting EU and North America retail, quoting efficacy requires pairing luminous flux, board power, and dimming range in the specification sheet. Omitting any one of these lets suppliers present optimistic numbers—such as peak efficacy at ideal conditions—while hiding real-world variability in thermal performance, color stability over time, or actual delivered lumens after optical losses.
Before finalizing a supplier, ask for the test report showing luminous flux and power at multiple dimming levels, confirm whether the 3,000 lm is measured bare-board or with the shade attached, and request documentation on color rendering (CRI) and chromaticity shift across the 2700-6500 K range—these factors determine whether the 100 lm/W figure translates to a marketable product that meets regional energy labeling and consumer expectations.