The Blue and Red Spectrum spikes with this bulb is perfect. It’s visually a light purple, and your plants will love it! I use it in a 4 bulb T5, with 2 Pink bulbs and a 3000k(warm white) bulb. This combination gives a slightly purple hue, but I have beautiful red and orange coloration on my plants. I will not look for a different bulb to replace this purple.