The more recent compact florescent light bulbs have a better output efficiency; for the same luminosity of a 100 W incandescent bulb needs only a 20 W compact fluorescent, and of these 20 W, 6 W are converted into light and only 14 W are lost in the form of heat.
Para obtener la misma luminosidad de una ampolleta incandescente de 100 W, es necesaria una sola ampolleta compacta de luz fluorescente de 20 W y, de esos 20 W, 6 W son convertidos en luz, perdiéndose únicamente 14 W en forma de calor.