Our LED Growth Light has 3 different wavelength. Namely - SolarC- VioletB- PinkyROur design comes in 2 rows of LEDs chips compact within e same space, allowing therefore stronger lighting output per unit area.How to choose?(1) Solar C - For General Application: simulate natural sunlight and is suitable for most plants.(2) Violet B - Boosting Growth and Foliage(Leave) Development:Using it with young seedlings can promote healthy roots and leaves.Use for indoor evergreen or veggies(3) Pinky R - For succulent and to promote Flowering Great for stimulating and induced the red pigments in some succulent plants, red lettuce(higher iron content),Come with a 1.8m length cable with integrated on/off switch.Accessories Available:- Crocodile Lamp Clip Holder $8Easy Clip-on installation of LED Growth Light with no nail or screw-on needed. - Inter-Lamp Cable Connecter $5This 50cm length end-to-end connector allows 2 lamps to be joined in series to increase the overall length of our LED Growth light.