Okay I'm going to stick my two cents in here even though I'm probably fishing. It does look like D. longispatha. Looking at it more closely, I think the problem stems from the fact that, that poor plants needs a bit of nitrogen and the sun itself, even for a few hours, could be too intense for those leaves and bleaching them out of the deeper green. But the color I'm seeing is more from lack of nitrogen. Chartreuse leaves tend to burn very quickly in intense light, these leaves look more nutrient starved. So there ya have it, my two cents.
Try D. Camouflage if ya can.
Good growing everyone.
