I've been thinking about the stretch myself, but its hard to imagine that they need more light... maybe it's a heat issue. This is totally off the top of my head, but could they be "running away" from the hps because of the heat? The young plants will enjoy lower temps; in flowering it's ok to have a little higher temps as long as it's in range.

I think the egg white isn't going to reflect very well, but probably better than the tinfoil anyways :jointsmile:

Apprentice? Hehe, I'm flattered but still a noob in many respects :weedpoke:

I like to help if I can, though!