wasser39｜An LED clamp light with stepless dimming and half-light mode

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The wasser39 is a slim-arm LED desk light that clamps onto the edge of a desk. According to the sales page specs, brightness is up to about 760lm, the light color is daylight white at about 5000K, and dimming is stepless. It also has a half-light mode for adjusting the balance of where the light falls, and on/off, dimming, and half-light are controlled with a touch panel on the clamp. The light color is fixed at 5000K; rather than a color-adjustment function, it adjusts brightness steplessly. Because the LEDs are built into the body, there is no need to prepare a separate bulb. It is a model worth considering as a study desk light, reading light, or remote-work desk light for anyone looking for a light to keep installed on their desk. Check the sales page for the latest pricing, stock, and color options.

Product highlights

A clamp-on LED desk light (integrated LED)
Brightness up to about 760lm
Light color: daylight white at about 5000K (no color adjustment)
Stepless dimming
Half-light mode for adjusting the balance of where the light falls
On/off, dimming, and half-light controlled with a touch panel on the clamp
Size about H732 × W50 × D700mm, weight about 0.7kg
Power AC100V–240V (50Hz/60Hz), maximum power consumption about 12W, power cord about 1.5m
Materials: aluminum / ABS; colors: silver and black; 1-year warranty

Design

An arm-light style LED clamp light that combines a slim arm with a shade. The size is listed as about H732 × W50 × D700mm, the weight as about 0.7kg, and the materials as aluminum and ABS. The sales page describes a clean design with no buttons on the shade—the dimming buttons are placed on the clamp—so you can operate it without shifting the light's position. It comes in silver and black, and black also fits easily into a black-based desk setup.

Up to about 760lm and 5000K daylight white

Brightness is listed as up to about 760lm and the light color as daylight white at about 5000K. The sales page introduces 5000K as a color said to be close to daytime sunlight. Because the light color is fixed at 5000K, there is no color-adjustment function to switch to warm or warm-white light. 760lm is the maximum; how bright it actually feels varies with the installation position, room environment, and dimming setting. It is a 5000K desk light worth considering if you want to light your hands with whiter light.

Stepless dimming and half-light mode

Dimming is stepless, making it a stepless-dimming desk light whose brightness adjusts continuously rather than in steps. The sales page also states that "the half-light mode lets you freely adjust the balance of where the light falls," introducing it as a function for when you want to adjust the area the light covers. On/off, dimming, and half-light are all operated with the touch panel on the clamp. The area the light actually covers varies with the installation position and arm angle.

Clamp mounting and slim arm

As a clamp-on desk light that attaches to the edge of the desktop, it can be used without placing a base on the desk. The size is about H732 × W50 × D700mm, and with the arm extended it also spreads in the depth direction. The sales page text does not list the desktop thickness the clamp can attach to. Depending on the shape of the desk and the thickness of the desktop, it may not be possible to attach it, so check the mounting conditions in the sales page images and product information before buying.

Power and power consumption

Power is listed as AC100V–240V (50Hz/60Hz), maximum power consumption as about 12W, and the power cord as about 1.5m. There is no built-in battery, so it needs power from an outlet while in use. Because the power cord is about 1.5m, checking the distance from the outlet to where you will attach the clamp in advance makes planning the installation easier.

How it differs from other desk lights

R13 Picks also features desk lights of other types. The Sanwa Direct 800-LED079 is also clamp-on but lights a wide area with 3 lights, up to about 1650 lumens, 5-step dimming, and 5-step color temperature. The wasser39 combines up to about 760lm and a 5000K light color with stepless dimming, a half-light mode, and a slim arm design. The atRise Y0662 is a base-type light that can be used cordless if you choose a rechargeable type, and the LIT000101 is a freestanding desk lamp that uses an E26 bulb. The point is not which is better, but choosing by use: whether you want to install it with a clamp, use it cordless, choose your own bulb, or light a wide area.

Use for study desks, reading, and remote work

The sales page lists uses at study desks, for reading, in offices, and in living rooms. You can consider it as a light for a fixed spot—installed on your desk as a work-from-home desk light, for studying at a study desk, for hands-on work at a work desk, or as a reading light. To set up your whole desk area, R13 Picks' "5 desk setup picks" and "10 Best Work Gadgets" may also help.

Points to check before buying

Check the sales page for the thickness and shape of desktop the clamp can attach to. You also need to check that there is space to move the arm and an outlet within reach of the power cord. It is listed as including a Japanese instruction manual with a 1-year warranty, but the latest terms on the sales page take priority. The latest pricing, stock, and color options may change, so check the sales page.

Who it may suit

Anyone looking for an LED desk light that can be installed on a desk with a clamp
Anyone who wants 5000K daylight white with stepless brightness adjustment
Anyone interested in a half-light mode for adjusting the area the light covers
Anyone who wants to keep the desktop clear with a slim arm and no base
Anyone looking for an arm light for a study desk or work-from-home desk