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Desk
BenQ ScreenBar Monitor Light Bar
A monitor light bar that publishes the numbers most desk lamps leave blank: lux at the surface, colour rendering, flicker.
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Who this is for
Someone lighting a desk for screen work who wants task light without a lamp reflecting in the monitor or eating desk space. Not for someone who needs to light a wide craft or drawing area evenly, or who wants a lamp head to pull down close over a book; the bar sits fixed on the monitor and lights the desk in front of it.
What to check before you buy
These are attributes you can verify yourself on the listing or in the product photographs, without taking anyone's word for it.
- A published lux figure with the measuring distance stated, not a bare lumen count
- R9 or a TM-30 Rf/Rg pair quoted separately, not just an averaged CRI
- Tunable colour temperature with a warm setting near 2700K for the evening
- A stated flicker or PWM behaviour, or compliance with IEEE PAR1789
- An asymmetric or shielded optic that keeps light off the screen and out of your eyes
- A dimming range that reaches genuinely low output for a dark room
Where it is likely to fail
LEDs rarely fail outright inside a decade; they fade and shift colour slowly, and a cheap driver is the part that dies or starts to buzz. The real disappointments are designed in from the start: a green-weak spectrum that renders skin and food badly, invisible flicker that tires the eyes, and a lowest brightness still too bright at night. Those are set at purchase and cannot be fixed later.
The honest caveat
BenQ states CRI above 95, a 500-lux centre pool to the ANSI office figure, a 2700 to 6500K range and a flicker-free driver; the separate R9 value is on the full datasheet rather than the listing. The bar clamps to the top of the monitor and has no arm, so it sets light height wherever your screen is, and it needs a USB port to run. If you want a lamp you can lower over paperwork, this is not it.
The reasoning behind these criteria is in the full guide: Desk lighting: the spec that matters isn't brightness.
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