i mean can i bring the suns energy into my projection and have it heal my projection so i can last longer?
I might not be the person to answer this, because I don't view projection to be an activity that drains an "energy tank" in our bodies which determines our time-limit (fortunately or unfortunately, a person's attainments in this field don't reflect their effort or cultivations that particuarlly well), but out of curiosity, what is the reasoning here? Definitely not discounting any possibility of things of which I know not, but why is the sun your theoretical target? Take me a bit deeper into the rabbit hole you are down.
You can use the sun to energize yourself during projection/meditation but more like a monk would do it, face the sun and meditate I mean.
Use the sun so you can stay longer in a projection? I don't know... I don't think that it would help at anything really, but you can try it. I think that monks only switch from meditation to astral projection all day long... when they come back they go in back in the meditation state, then try again for astral projection but I don't think the sun has anything to do with it.
You can get all the energy you need in astral projection it's everywhere around you. But I don't understand why you would need to heal your projections. Just absorb the energy around you and transform it?
your talking about the yoga practice. The sun meditation and I'm familiar with that. The sun is an alagory for the one source of all. Just as the sun give the earth warmth and light, so it is with God .. well yoga has another term but I'll use what we're familair with in the west.