Kuwanda kwesimba rechiedza kubva kune chero LED kana laser therapy mudziyo unogona kuyedzwa ne 'solar power meter' - chigadzirwa chinowanzonzwa kupenya mu400nm - 1100nm renji - ichipa kuverenga mumW/cm² kana W/m² ( 100W/m² = 10mW/cm²).
Nemamita emagetsi ezuva uye mutongi, unogona kuyera simba rechiedza chako nedaro.
Iwe unogona kuyedza chero LED kana laser kuti uwane simba density pane yakapihwa nzvimbo. Magetsi akazara akadai sema incandescents & mwenje wekupisa haugone kuyedzwa nenzira iyi zvinosiririsa nekuti zvakawanda zvekubuda hazvisi muchikamu chakakodzera chekurapa kwechiedza, saka kuverenga kuchawedzerwa. MaLaser uye maLED anopa kuverenga chaiko nekuti anongoburitsa wavelengths +/- 20 yewavelength yavo yakataurwa. 'Solar' magetsi metres sezviri pachena akagadzirirwa kuyera chiedza chezuva, saka haina kunyatso kurongeka kuyera imwechete wavelength LED mwenje - iwo maverengero achave ebhora bhora asi akakwana zvakakwana. Yakanyanya kunaka (uye inodhura) LED mwenje metres iripo.