Hey @Dyl , I linked your first post here for reference. The purple type of lights we see can grow cannabis and in fact I still use a couple ones I bought years ago to start seedlings and grow basil. But growing 5 plants is well beyond their capability. Even growing a single plant you will get sub-par results. The sellers of those lights exaggerate the advertising and trick buyers into purchasing them. Don’t feel bad though because a great number of us did the same thing. You need to scale down to a single plant under those lights if you have to use them, or spring for real lighting and upgrade to something designed for cannabis which as stated by others wants a LOT of light. The current LED of choice is the Samsung LM301B or LM301H. Same diode but the H version is a little more efficient and uses slightly less electricity. Be careful because there are counterfeit versions out there of these type of lights too. Best to post your choice here and ask if its a legit light before purchasing.
As mentioned your plants look good except for the light issue. Once you address that you should have great results.