process by which the resonance radiation emitted in a lamp is absorbed and re-emitted many times in the plasma prior to striking the phosphor, protsess, mille puhul lambis emiteeritud resonantskiirgus absorbeeritakse ja taasemiteeritakse plasmas paljukordselt enne selle kohtumist fosfooriga (luminofooriga), et pikendada lambi eluiga