My pleasure ms. I should have mentioned I got mine from picknmix.
Welcome aboard SICC.
Hey tags.
If you veg for 4 weeks and switch the lights, it will take a further week or 2 for the plant to show it's first flower, which would mean 6 weeks of veg really. Personally I only consider the plant to be showing sex at that point and I wait a further 10 - 14 days until it is putting out pistils instead of leaves before I commence counting down the flowering time. That could mean up to 8 weeks of vegging for you.
There's also an issue where the plant freaks out after going to 12/12 overnight that's called the stretch. They will at least double in size within a couple of weeks of switching, even more if there's some sativa in the genetics.
To save aggro I start them off under 12/12 and give them plenty of LST. The stretch gets them where they need to be and ensures they can finish in the case.
There's pro's & cons to coco. I'm doing ok in it but I suspect I'd be getting similar results with soil and perlite. I like the fact that I can just fill a pot with it and stick a plant in, rather than rinsing perlite and having to blend it with soil every time I repot something. On the other hand, once the plants get into their stride they need watering every day and I can't always look in on them that often.
I think if you choose coco you should get the coco specific nutes as well as there seems to be an abundance of potassium in there that could cause problems with soil or hydro nutes. I paid £12 for 50L of canna coco.
Wasn't sure exactly what you were looking for with the pics of the reflector, but here's a couple I took:
EDIT: Just in case you wondered about the gap between the 2 reflectors, I did it because a single reflector above seems to focus the light directly below the bulb and it singed a couple of buds. The gap just stops that from happening and shouldn't really be needed for cfl's.