Available strengths vary widely. Listed magnifications include about 1.8×–4.8× and common single strengths such as 2×, 2.25× (5‑diopter), 3×, and 4×; many models also include a 5× spot lens.
Lens types include aspheric acrylic lenses and genuine diopter glass lenses. Common sizes called out include a 4.3 in (110 mm) aspheric main lens and a 5 in round 5‑diopter lens, plus smaller built‑in spot lenses (for example, a 5× spot).
Most models use LEDs: integrated or built‑in LED modules, COB LED arrays, and multi‑LED arrays (examples list 4 COB LEDs or 6 LEDs). Some designs use LED headlamps for hands‑free lighting.
Desk magnifier lamps commonly have adjustable arms and heights: examples show arm extension or adjustable height up to about 47 inches, assembled heights around 29–33 inches, and cord lengths in the 6 to 8 foot range.
Power options include battery power (examples list 3 AAA, 3 AA, or 2 AA), USB‑C adapter power on some models, and corded electric models with built‑in LED modules.
Controls range from simple on/off switches to multi‑position switches, multi‑level dimmers, and touch or rocker sensors. Some models list explicit settings (e.g., 2 or 3 brightness levels or a built‑in 3‑way dimmer), and a few include lumen or lux output information.
Lenses are listed as glass (including “genuine diopter” glass) or acrylic aspheric; bodies are described as metal or plastic.
Some listings provide lux (for example, up to 3,800 lux on a light pad), lumen outputs (examples roughly 600–760 lumens for lamps), color temperatures like 3000K and 6000K, CRI values around 80, and explicit brightness controls such as 2 or 3 settings or a 3‑way dimmer.
