Is a half lb to high of a expectation

It's very possible with proper training. I got 1.25lbs on my last harvest in a 48x48 tent with LEDs. I'm in hydro, but I don't think a half pound is unobtainable or too much to hope for.

That’s what 227g Mmm I think that’s a high expectation especially in soil using blurple type leds. To give yourself a decent shot you would need to scrog or sog and use a decent brand led. Remember that wattage corresponds to yield. I would use around 250-300w worth of led which maybe overkill for such a small space but would give you the best chance of hitting high numbers and decent penetration into the canopy. Also environment being on point is key but I guess you already know that. Always aim high pal and good luck👍