Chaeto not growin

[jason604]

I bought a handful of chaeto from JL about 4-5 months ago and put them in my sump and it hasn't grown even a teeny tiny bit lol. I used one of them plant growing light bulbs from Home Depot that's dipped green or blue cant remember 60w. Since it burned last month I'm using a reg 60w bulb. I sure it's prob cuz of my lights. If that's the case is there any cheap lights that will promote its growth? I've read about other reefers chaeto growing like mad. Does growing even matters for my water quality? The chaeto is still as green as ever.