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ULANZI K20 key light, 10 W, 600 lumens, 192 LEDs review

An 11 inch key light that clamps to a desk and comes with a magnetic remote reaching 30 metres, for 48 € — publishing 600 lumens, which measures total light output rather than what lands on a face.

The bottom line The clamp, the ball head and the 30-metre remote are better specified than anything else on this shelf, and for a desk that is what matters. The output is published in lumens rather than lux, the colour index is the weakest of the four, and there is no battery at all.

On the listing

Five bracketed bullets. A 10 W streaming light with 0 to 100 per cent brightness, 2500K to 9000K, an 11 inch studio panel with a 120 degree beam and 192 high-brightness beads, edge-lit for even soft light, with CRI above 90 for natural skin; a magnetic anti-loss remote with 30 m range, a stable signal and 7 channels, able to control one light, several groups or all in sync; a pairing explanation — the number on the back of the panel is its channel, changed by holding CH on the remote or pressing CH on the light; a space-saving desk mount with a metal C-clamp taking 0 to 50 mm, adjustable from 30 to 80 cm on a 360 degree aluminium ball head; and a uses bullet naming streaming, TikTok, home office, video conferences, gaming, YouTube, Zoom, webcam video and photography.

Six hundred lumens, which answers a different question

The shelf asks how much light lands; this page says how much leaves. Lumens are a total emission; lux is what arrives on a surface at a known distance. Spread across a 120 degree beam from an 11 inch panel, 600 lumens is a soft wash rather than a punch — but how soft, at the distance a person sits from a desk, cannot be calculated from this page.

A mount specified to the millimetre

Nought to fifty millimetres of jaw, thirty to eighty centimetres of height, a 360 degree ball head, aluminium alloy. Every other panel on this shelf either supplies a small tripod or says nothing at all. For a light that has to survive a desk being tidied around it, this is the specification that matters.

Thirty metres, seven channels, and a magnet

More range than a desk could ever need, and the channels are the real feature: two or three panels can be set apart or moved together without reaching behind any of them. The remote sticks to anything ferrous, which is the sort of detail that comes from watching people lose remotes.

No battery, anywhere on the page

The third bullet says the light comes on when it is plugged in. No cell, no capacity, no runtime — this is a fixture for a desk with a socket, and the two cheaper panels on this shelf both run from their own cells.

Availability

Between 46 € and 52 € on the German, French, Italian and Spanish Amazon stores when this page was last checked.

The British Amazon store carry it too, priced in local currency. Those amounts are deliberately absent from the range above, which reads euro stores only.

Listed in the American Amazon catalogue with nothing on sale against the entry: the camera has a page there and no seller behind it.

Everything in this section is the figure Keepa carried on the day of the last update to this page. Availability and prices shift without notice.

Prices quoted in this text were read on 13 September 2026. The live price is at the top of the page.

What it does well, and what it gives up

Strengths

  • A fully specified desk mount: 0 to 50 mm clamp, 30 to 80 cm height, 360 degree ball head
  • A magnetic remote with 7 channels and 30 m range, able to control one light or several groups in sync
  • 2500K to 9000K across an 11 inch edge-lit panel with a 120 degree beam

Compromises

  • 600 lumens measures emitted light, not what reaches a subject, so it answers a different question from the shelf’s
  • CRI above 90 is the weakest accuracy claim of the four panels here
  • Mains only — no cell, no capacity and no runtime named anywhere on the page

Specifications

Output in lux with its distanceNot published in lux. The first bullet gives 600 lumens, which is a different quantity: lumens count the total light a source emits in every direction, while lux measures how much of it lands on a surface at a given distance. A wide 120 degree beam spreads those lumens over a large area, so the figure cannot be converted into the lux the hub above asks for without knowing the distance and the spread
Colour temperature range2500K to 9000K, in the first bullet — the same span as the pocket panel on this shelf and wider than either studio fixture here
Accuracy indicesCRI above 90, in the first bullet, which adds that it makes skin look more natural. One index, and the lowest of the three figures published on this shelf: 98 on the Rollei, 95 or better on the RaLeno, 96 or better on the Neewer pair. Above 90 is usable and is the weakest claim among the four
Dimming0 to 100 per cent, in the first bullet. No step count and no statement of whether it is continuous
FlickerNot addressed on the listing. The first bullet describes edge-lit construction spreading light evenly across the emitting surface for soft, eye-protecting light, and no frame rates or flicker-free claim appear anywhere
Power optionsMains only, by implication: the third bullet says the light switches on automatically once plugged in, and no cell, no capacity and no runtime is named anywhere. Of the four panels here this is the only one with no battery option described
MountA solid metal C-clamp with a 0 to 50 mm jaw for most desks, height adjustable from 30 to 80 cm, on a 360 degree ball head in aluminium alloy — the fourth bullet. It is the most fully specified mount on this shelf, and it is a desk clamp rather than a shoe or a spigot
Amazon referenceB0DM1RB1J2 (same reference on 6 Amazon marketplaces)
EAN6975357306331

What people ask before they commit

What is the difference between lumens and lux?

Lumens count all the light a source puts out, in every direction. Lux measures how much of that light falls on a square metre of surface at a stated distance. A light with a wide beam spreads its lumens thinly, so a high lumen figure can still give modest lux on a face. The hub above asks for lux with its distance because that is the figure describing what the camera actually sees.

What does the 7-channel remote allow?

Several lights, controlled separately or together. The second bullet says the number on the back of each panel is its channel, changed by a short press, and that the remote can drive a single light, several groups, or synchronise them all. For a two- or three-light desk setup that removes reaching behind each panel — and the remote is magnetic, so it sticks to anything ferrous.

Is edge-lit better than a direct panel?

It is softer. Emitters at the edges fire into a diffusing sheet, so the whole surface glows evenly rather than showing 192 individual points. The trade is output: some light is lost inside the panel. It is the same construction as the RaLeno on this shelf and the reason both give pleasant light at modest brightness.