Now that I'm retired I've decided to grow my own. I have 4 little ones with a problem already. As you see in the attached photo the leaves have started to turn yellow. All 4 are the same. I have the light adjusted to 50%. On 18 off 6. Anyone with any advice would be greatly appreciated for the old man. White Widow Auto 4'x4'x6.5' Mars Hydro LED / 310W Mars TSW 2000 Black Gold Compost Blend