Laser energy is reduced if surrounding temperature rises. Therefore, iHelmet is equipped with a temperature sensor to solve this problem.
Under same time length of treatment, energy absorbed by scalp varies by 30% between winter and summer. Whereas coherent energy emitted by iHelmet keeps the same high efficiency of hair growth between winter and summer.
Laser energy is reduced once surrounding temperature rises. Thus, longer treatment time is required to compensate the energy loss if the temperature rises. This is what all other hair growth devices don’t care about. But iHelmet does.
The time you spent on an episode of a TV series, you already fulfill an effective hair growth treatment.