For at least the second time I’m trying an umbrella plant in the enclosure and it’s not looking so great and losing leaves. It’s on the bottom of a 2x2x4 and I do have a sansi 15w grow bulb. It’s partially shaded by other plants and stuff. Is this not enough? Do I need to get the big 6500k grow light? The plant itself is healthy. First time it started looking ill I put it outside and it did great. Now it’s back in and ailing. Pretty much have had the same problem with hibiscus too. Advice?