Uhhh, In response to the original post, If you only dividend the plants this year, I would be surprised any would be blooming at all. Perennials often take much longer to grow bigger than annuals, atleast cold hardy ones in my climate, and a division would be so stressful that it might not bloom the year it was divided. That happens when the divisions are very small or the plant does not divide well. It is focusing on restoring its biomass. Indoors you say? Is it a cold hardy plant or one that is usually grown as a houseplant. If the plant needs a cold rest period, those plants almost always do better outside. Rarely can these plants do well for a long period. The divdees doing poorly may be exhibiting a nutrient deficiency, water stress, or light deprivation, or distaste for being indoors in general, and that would be a combination of all the above. Full sun perennials almost never do good on windowsills unless they are very large and the window is south facing where they can get direct sun most of the day. Without any indications of the growing conditions they are in or plants, I dare not hazard a guess on the exact cause or problem your plants are exhibiting.

These? do they come in CFLs? :) Here is a link that might be useful: maybe?

Looks interesting, for a second I thought it might actually be some sort of cristate form conifer, but I think it's actually either cactus or succulent. Maybe Crassula Argentea "Coral" Rhipsalis cereuscula

was a well behaved plant in one garden .. moved 60 miles.. and it turned into a reseeding nightmare ... ken