UV and LED curing lamps differ in their light source technology, wavelength emission, curing speed, and cost. UV lamps use mercury vapor bulbs that emit a broader spectrum of ultraviolet light (typically 320-400 nm), while LED lamps use light-emitting diodes to produce specific narrow wavelengths, most commonly 395-405 nm. This fundamental difference affects performance: LED lamps cure faster because they emit light at wavelengths that photoinitiators in curing products absorb most efficiently, often reducing cure time from minutes to seconds. LED lamps also generate less heat, stay cool to the touch, and have longer lifespans (up to 10,000+ hours versus 1,000 hours for UV bulbs), making them more economical over time despite higher upfront costs. UV lamps are cheaper initially and work with a wider range of products since many formulations were developed for their broader spectrum. However, LED lamps are more energy-efficient, don't require warm-up time, and don't degrade as quickly. In professional settings like nail salons and dentistry, LED has become dominant because the faster curing improves workflow and reduces operating costs. UV lamps remain viable for certain specialized applications where product compatibility is critical. Neither is inherently "better"—the choice depends on specific products being cured, budget constraints, and desired speed. Most modern curing products are formulated to work with both technologies.