Ok so I have 25 seedlings in a flood and drain table and i just notice that 1 of them has yellow stripes on the leaf tips.. It is about 14 " away from the light and doent seem too hot... Odd how only 1 out of 25 has yellowing tips... Although the leaf hasnt shrivelled any just turned yellow a bit at the tips.. ANY HELP WOULD BE GREAT!!! THANKS!! PLEASE COMMENT.