I have a 20 gallon tank with a 26 watt compact floro daylight bulb and a fan for rooting cuttings.
I use a 65-45% pearlite and LFS mix with nep stems cut and dipped in rootone.
I found 100% pearlite to produce leaves quick but took a long time to make roots.
100% LFS made great roots but took forever to make leaves.
Also 100% LFS is hard to remove from the root system of the cutting, the pearlite helps to make it easier to pull out of the rooting mix.
So I made a mix of the 2 this last try and it worked great
I was surprised that the 26 watt light was enough for the neps.
I know it looks ghetto but it's in my room and no one sees it but me.
It's wrapped in a emergency thermal blanket from wallyworld.