Just for future reference for people who have the same problem (plant looks like a Y, leaves pointing up) you should move your lights farther away. I had the same problem and just thought I was overreacting because of all the people in this thread saying it's okay. I did plenty of googling found a few others with the same problem, but no definitive answer and just figured I was worrying too much as first timers tend to do. After moving my lights they have recovered and are doing great.
Just goes to show, way too many people have no idea what they're talking about on the internet. Heck just look at the people in this very thread who say the camping blankets at Walmart are mylar.
Edit: I can't complain about people giving bad info without correcting so.. Use flat white paint, mylar, elastomeric roof coating, or panda film for your walls. Emergency blankets are made to retain heat, not light. Although they are pretty reflective they are porous and let light through. Also, unless you can keep them flat (they're really thin) you may run into hot spots just like tin foil with the curves focusing light on small spots.
