Cheaper LEDs are often very broad in terms of their output, so they may have a specification of 100nm ie. between 600-700nm. This means the light emitted is not very pure and is a mixture of wavelengths. So, whilst you may achieve some light absorption into the skin, you won’t achieve optimal absorption.Additionally, if the wavelength is not powered into the skin at an optimal intensity, the wavelength won’t reach its target within the skin.If you think of intensity like a tap being turned on to fill a sink. Turn on sufficiently and let the water gently and efficiently fill the sink OR turn on the tap a trickle and it takes ages to fill the sink OR turn on too much and water splashes everywhere. It’s the same with LED technology – there is a correct intensity to deliver the right amount of light into the skin. If you deliver too much too quickly you can generate heat in the tissue and also the cells do not have time to process the photons (light energy). Deliver too little and you won’t have an effect.Good quality LEDs have an output specification of +/- 5 or +/- 10 (max), meaning the output of an 830nm device will deliver wavelengths between 825-835nm or 820/840nm. We work with the industry leading and clinically proven wavelengths at the optimal absorption peak.