Is this amount of lighting sufficient for 2 plants or one plants? I usually hear 100w is needed for one plant and then 50w for the extra plants or does 45w amount to 200W or less? I plan on getting this with the 45W LED lights http://www.mrgrowpro.net/
Keep in mind most LEDs operate somewhere around 2/3 of their stated wattage, so you're likely to get 30W out of that light (assuming it's a high quality LED, your link is broken).
It won't be enought. However those led bar looks like the best option for side lighting (a must with leds)
it can work. 40g possible to get from a pc case. google this: Pinstripe's 2nd try I am making a box with ~40w as well The thing with leds is, the "100w per plant" does not apply, another rule is used with leds, that is 60w used power (not advertised) per 1 sq. foot. My pc case is like 0.4 sq. ft. Though it will be my first grow, so we will see how it goes. will do 2 autos in 2.5 liters hempy buckets. And dude, like austyn said, consider making your own, much cheaper. And its pretty cool to know that yue maed dis