yeh, ive had a strain like that before, it was real bright green, and the leaves would form, then curl, the plants were still fine though, i think the strain needed alot more light, some plants, mostly sativa but occasionally hybrids, need more light, you can tell roughly how much light a plant needs by the shade of it, most indicas are alot darker, as they have more chlorophylls (photosynthesizing cells) meaning they can take in more light therefore they need less light, where as a bright green sativa (providing it hasnt got an N defficiency) will have less chlorophylls therefore needing more lumens (light units) so each cell can photosynthesize to its full capacity..

im guessin ur new, so its as simple as i can put it..

just put the lights as close as you can without touching the plant, about 2-3 inches away is good enough,