Compare the light’s input requirements with the exact output port. A hub’s 100 W pass-through headline does not describe every USB-C socket.
Recommendations based on documented features and fit, without hands-on performance testing.
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BenQ lists maximum consumption of 8.5 W. Choose the light for its task-lighting features and plan a supply that meets its own input specification.
Skip it if: You are relying on an accessory port whose documented output is below the required input arrangement.
Find on Amazon Check manufacturer details ↗Its specification lists a 5 V, maximum 3 A USB-C input and maximum consumption of 15 W. Rear lighting and wireless control do not remove that power-planning requirement.
Skip it if: Your plan assumes any USB-C data port provides its listed maximum input power.
Find on Amazon Check manufacturer details ↗A USB-C plug fitting into a socket does not establish that the socket can supply the light’s required power. Check the light’s input specification and the exact hub port’s output specification. Keep the data ports and pass-through charging input separate in your diagram.
For the named examples here, this distinction changes the shopping plan. BenQ lists maximum consumption of 15 W for ScreenBar Halo 2 and 8.5 W for ScreenBar Pro. Anker lists the A8355 USB-C data port at 5 V and 1.5 A, or 7.5 W.
These published maxima are not measurements of typical consumption or proof of a particular operating mode.
| Item | Published figure | Planning implication |
|---|---|---|
| A8355 USB-C data output | 5 V × 1.5 A = 7.5 W | Do not treat it as a 100 W accessory output |
| ScreenBar Pro maximum consumption | 8.5 W | Above that 7.5 W data-port figure |
| ScreenBar Halo 2 maximum consumption | 15 W | Also above that data-port figure |
| A8355 PD input | Up to 100 W input | An input is not a general-purpose output for a lamp |
The Pro maximum is 1 W above the listed data-port output; the Halo 2 maximum is 7.5 W above it. These differences tell you not to plan for the lights’ full published requirements from that data port. They do not prove a light will never illuminate, predict dimming behavior, or establish safe operation in a lower-power mode.
Use the manufacturer’s supported power arrangement rather than experimenting around an unresolved requirement. A device appearing to turn on is a weaker check than matching its documented supply conditions.
Write the wall supply, cable and light as one path. Write the laptop and hub as a second path. Only combine them when the documentation supports the exact connection. A tidier photograph is not a reason to hide an unsupported power assumption in a cable tray.
If you need a separate suitable supply for the lamp, include its size, socket and cable route in the complete desk plan. Check package contents rather than assuming the necessary wall adapter is included.
Compare Pro when front task lighting is the job. Compare Halo 2 when its rear illumination and wireless controller are functions you will use. Their power specifications help you plan the installation; they are not a ranking of lighting quality.
BenQ publishes the same task-light coverage figure for these two models under the stated specification conditions. The reason to investigate Halo 2 is its additional arrangement and controls, not an assumed improvement in every lighting characteristic.
Record the exact lamp model and its input voltage/current requirements. Record the exact socket you intend to use and its documented output. Confirm the cable and supply conditions in the manufacturer instructions. If one step is unknown, resolve it before ordering.
This is a comparison of documented limits across products, not a hands-on electrical test. Use current manufacturer instructions for the supported arrangement and leave required ventilation and cable movement available in the final setup.
This is a specification-based buying guide. Product descriptions come from the sources below; the fit examples and decision rules are our editorial analysis. We have not measured durability, performance, or comfort in a product test.
Confirm the exact variant and current retailer listing before buying. Read our selection method.
