I use the
Giesemannn Aquaflora as well. It is one of many "pink" bulbs that have the spectrum that plants need and they also bring out the red colors. Avoid bulbs that have a blue cast including a 10,000K bulb. They will make your red plants not "pop" and look dull. Zoo Med has the
Flora Sun that has a pink cask and it is somewhat inexpensive. Current USA has a
Freshwater bulb that is pinkish too. Other pinkish bulbs are
Aquatic Life's Roseate bulbs,
Coralife's Colormax (make sure that you get the HO version, they also have a NO version too),
True Lumen's Freshwater Flora
I purchased several of the Giesemann Aquaflora bulbs, but I bought Zoo Med's Flora Sun for replacements because they are about half of the price of the Giesemann's.