NADH-dependent L-xylulose reductase; part of the yeast pathway for L-arabinose catabolism (PubMed:14736891). Reversibly converts L-xylulose to xylitol and D-ribulose to D-arabinitol (PubMed:14736891). It has a much lower activity with D-xylulose (PubMed:14736891). Sugar alcohols can serve as a substrate when the hydroxyl group of C-2 is in the L- and the hydroxyl group of the C-3 is in the D-configuration (PubMed:14736891). Seems also to be specific for sugar alcohols that have not more than 5 carbons since no activity is observed with dulcitol (galactitol), which has the hydroxyl group of C-2 in L- and of C-3 in D-configuration, but is a six-carbon sugar alcohol (PubMed:14736891). NAD(+) + xylitol = H(+) + L-xylulose + NADH D-arabinitol + NAD(+) = D-ribulose + H(+) + NADH Strongly expressed during growth on L-arabinose. Belongs to the short-chain dehydrogenases/reductases (SDR) family.