The vegetative in vitro propagation of Lemna minor stain SING-4 exposed to two different types of fluorescent light
sources, Philips TLD 36W/54 and Toshiba FL40T8BRF/36, was studied. The liquid culture medium contained 4.43gl<sup>-1</sup>
phytohormone-free full-strength Murashige & Skoog (MS) basal medium with vitamins, 30gl<sup>-1</sup> sucrose, and 1gl<sup>-1</sup> MES.
The results showed that both plant cultures had undergone normal asexual reproduction with an exponential increase
trend. Cultures exposed to Toshiba FL40T8BRF/36 reproduced at a slightly faster rate while expressing significantly
greener foliage (leaf color chart shade No.8), which indicates the presence of more chlorophyll, than cultures exposed to
Philips TLD 36W/54 (leaf color chart shade No.4). The data obtained from our experiment reveals that light emitted
from Toshiba FL40T8BRF/36 produces healthier and higher quality cultures.