Cactus

http://www.magicactus.com/index.html

Bat Guano

http://aurorainnovations.com/super-nitro-bat-guano.html

Rhipsalis cereuscula

http://cactiguide.com/cactus/?genus=Rhipsalis&species=cereuscula

Cactus Nursery

http://cactusland.co.uk/about.php

Cactus growing under artificial light

useful article:

http://cactiguide.com/article/?article=article17.php

Mylar

Mylar is the brand name for a special type of stretched polyester film. Melinex and Hostaphan are two other well known trade names for this plastic, which is more generally known as BoPET or biaxially-oriented polyethylene terephthalate.   

LED Grow lights

useful article:

http://www.myhydroponicgardening.com/2013-best-led-grow-light-review/


SUPPLIERS:

http://www.ledhydroponics.co.uk/OnlineShop.aspx

http://www.hydrogrowled.com/%2F84X-PRO-120W-LED-Grow-Light-P84.aspx

http://www.truliteled.com/shop/

http://ledlight.osram-os.com/applications/horticultural-led-lighting/

http://growblu.com/

http://www.growlightuk.com/

http://www.dormgrow.com/

http://www.advancedledlights.com/

http://www.lumigrow.com/products/es-330-led-grow-light/

http://www.lightrabbit.co.uk/grow-lights-led.html

reviews:
http://www.theweedblog.com/led-cannabis-grow-light-review/

notes:
HID (high-intensity discharge) systems, like HPS and MH, were the clear favorites among the growers

stealth led grow light?

Composting

useful thread:

http://www.wildaboutbritain.co.uk/forums/wildlife-gardening/12636-composting-101-a.html