First grow! Check it out!

Dear readers, this is my very first grow. Not the best idea starting it during my finals because I can't stpo thinking about them. First of all the germination went normal I think. As you see they popped out nicely. This fotos were taken on day 13. I don't have quite an idea of they are growing well but my guess is that they are behind on schedule. I think it is because I didn't gave them enough light at the start (16 hours). The last thee fotos are taken on day 15 and the past 2 days ive increased the light schedule with 2 hours and my feeling is that they have grown more in this 2 days then they did before. Can someone tell his/her opinion about this? For the setup, im running this fluorescent lights, all 3 have 2200 lumen. I don't really know of this is enough. However more lights are on their way but I've also a question about that. I'm planning to add HPS lights, they come in handy in the flowering phase (with their warm-white colour) and they have 4500 lumen each. I was wondering if it matters putting them togheter with the white lights as we speak (because they will be another 3 weeks in vegetation and I'm not sure if it is "allowed" to use warm white color in this stage). Also do I have to mention that I don't know the strains of the plants, I messed those up when i put t seeds in the water for the germination LOL. However, one of them has some strange colour changing on the leafs, i looked it up but the cause can literally be everything. Can anyone help me with that? If you have any tips, feel free to let em know! Thanks!