Your needs, this model
Does it fit your priorities?
Does the lamp have a published wide-area measurement?
OttLite lists maximum output of 450 lumens but publishes no width at 500 lux or center-illuminance figure in the reviewed product page or manual. Lumens alone do not establish a desk coverage area.
Explore this need in the finder →What tabletop support and height does the reviewed configuration document?
The product page lists a fixed tabletop base 6.875 inches in diameter and an adjustable height from 21 to 25 inches. The reviewed sources do not document a clip or compatible clamp.
Explore this need in the finder →Is the published CRI figure consistent?
No. OttLite's product page states CRI 97 in its opening description and CRI 95 in the feature list. This assessment uses 95 conservatively for the threshold requirement and treats the exact value as unresolved.
Explore this need in the finder →The OttLite Wireless Charging LED Table Lamp (US SKU CSAQA4K9-SHPR) combines a mains-powered LED lamp with a Qi pad and a separate USB charging port in its tabletop base. That makes it a different choice from a lamp selected for a clamp mount, battery portability, or a manufacturer-stated work-area measurement. This is a source-based assessment of OttLite’s product page and instructions, not a hands-on test; no independent light-output or charging test is claimed.
A taller tabletop arrangement, not a clamp lamp
OttLite lists an adjustable height from 21 to 25 inches and a base diameter of 6.875 inches. The manual says the shade can be moved to direct the light and advises holding the base while repositioning it. The product therefore offers a taller fixed-base setup with an adjustable shade, rather than the multi-joint swing arm of the BenQ e-Reading Desk Lamp or the detachable, rechargeable head of the OttLite Switch 3-in-1. The reviewed sources do not document a desk clamp, clip, height range for every joint, or a measured reach envelope.
The base is both the support and part of the device-charging arrangement. Its listed diameter is useful when checking a crowded desk, although it is not a complete footprint for the whole lamp. The Qi charging area sits in the base, so the phone and the lamp share that surface. That is a practical layout consideration, not a claim that a device will fit every case or remain correctly aligned; the manual requires a Qi-certified device and says to center it over the charging symbol.
Device charging has two separate routes
The manual specifies an integrated Qi charger with output up to 10 watts, depending on the device, plus a 5-volt, 2.1-amp USB output at the lower rear of the lamp. The Qi pad is for Qi-certified devices; a steady red indicator means the device is charging, while a blinking light means it needs to be repositioned. OttLite cautions that a device can become warm during wireless charging and that charge times vary by device. These details help set expectations, but the published maximum is not a guarantee of a particular phone’s charging rate.
This is not a cordless lamp: the manual says to power it from the supplied adapter and lists the adapter at 12 V DC, 3 A output, with 100–240 V AC, 50/60 Hz input. It also says to use the supplied adapter to avoid damage or fire. The USB port and Qi pad are accessory-charging features; they do not make the lamp itself battery-powered. The reviewed sources do not state the cord length, total lamp power draw, or the performance of both charging routes when used together, so those details should be checked in the current exact-package documentation if they matter to the setup.
Controls are clear; the coverage claim is not
The instructions describe three touch-selected brightness levels and three color modes: 2700 K, 4000 K, and 5000 K, with 5000 K as the default. A brief touch cycles the brightness levels; holding the switch for three seconds changes the color mode. This gives a choice of discrete settings, not a continuous dimming range. OttLite lists maximum output of 450 lumens, but neither the product page nor the manual gives a center-illuminance figure or a width at 500 lux. A lumen figure alone does not tell you how evenly a particular desk area will be lit or whether it will suit paper-and-screen work. BenQ, by comparison, publishes a 90 cm width at 500 lux for its e-Reading model; the two claims are not directly interchangeable measurements.
There is an internal inconsistency in OttLite’s published color-rendering copy: the opening description says CRI 97, while the feature list says CRI 95. Both are manufacturer-published values, but the page does not resolve which exact figure applies to this SKU. For threshold matching, this assessment retains the lower reported value of 95; it should not be read as a verified independent measurement or as a resolution of the page discrepancy. OttLite also says its ClearSun LEDs reduce eyestrain by 51 percent and rates the LEDs for up to 40,000 hours. Those remain manufacturer claims, not results independently established here.
Consider the integrated light source before buying
The W5 instructions say the light source is not replaceable and that the entire luminaire should be replaced when it reaches end of life. The lamp is indoor-only. The manual also cautions that the shade may become hot after several hours of continuous use. These are more consequential ownership details than a general lifespan number: the listed 40,000-hour rating does not mean the light head is a field-serviceable part or guarantee the life of the whole product.
The official manual names three codes—CSAQA4KZ, CSAQA4K9-SHPR, and CSAQABG9-SHPR—while the current OttLite product page identifies the reviewed black option as CSAQA4K9-SHPR. This review is limited to that exact current US SKU; the manual’s shared instructions alone do not establish that every listed code has identical finish, package, or revision details. Confirm the SKU on the offer, that the supplied adapter and instructions are present, and that the base has enough room for both the lamp and the device you intend to charge.
Who may find this arrangement useful
This lamp is a plausible research-led fit for someone who wants a taller tabletop light, a movable shade, and device charging built into the base. Its useful distinction is the pair of charging routes—not a substantiated broad beam, a clamp mount, or portable battery operation. The base is the only documented support arrangement in the reviewed material. If clearing the tabletop is essential, compare lamps with an explicitly compatible clamp; if you need illumination specified across a wide work area, look for a product that publishes a lux threshold and width rather than treating maximum lumens as a substitute.
Against the OttLite Switch 3-in-1 assessment, this table lamp is taller and has the Qi/USB device-charging base, while the Switch is the rechargeable model with a separate base, clip, and handheld arrangement. Against the BenQ e-Reading assessment, this OttLite model has two device-charging methods but no published 500-lux coverage width or compatible clamp in the reviewed evidence. Those are different tradeoffs, not an overall ranking. Before choosing, match the exact model code, use the official adapter, verify the Qi requirements of your device, and decide whether the missing coverage and service details fit your priorities.
Key specifications
Key details at a glance
| Lowest listed color rendering index (Ra) | 95 |
|---|---|
| Lowest color temperature | 2700 K |
| Highest color temperature | 5000 K |
| Brightness levels | 3 |
| Documented tabletop arrangements | Tabletop base |
| Highest listed lamp height | 25 in |
| Listed base diameter | 6.88 in |
| Power adapter included | Yes |
| User-replaceable light source | No |
| Maximum listed luminous flux | 450 lm |
| Lowest listed lamp height | 21 in |
| Qi pad maximum output (device-dependent) | 10 W |
| USB device-charging output | 5 V |
| USB device-charging current | 2.1 A |
| Qi device-charging pad | Yes |
| Qi-certified device required | Yes |
Use the exact model’s instructions for operating limits, supplied equipment and version differences.
Sources for this review
Sources for this assessment
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A lamp’s specifications are only useful when they fit your workspace. Use the finder to compare documented mount and adjustment arrangements.
