LED grow lights for 40cmx40cmx120cm

Hi. Dear LED growers.
I'm confused about LED lights.
I want to get UFO LED for 40x40x120cm grow room
How much watts I want?
I want to grow one Lady in that area.
I'm thinking to get UFO from AliExpress
As far as I understand I need 5band 3w chips.
What about emit angle? 90 is okay?
5Band Led hydroponics lighting 90W with 45x3W=135W
http://www.aliexpress.com/item/EMS-free-shipping-5Band-Led-hydroponics-lighting-90W-with-45x3W-135W-better-for-grow-3years-warranty/631768768.html
Or this is overkill For such a room?

LED bulbs are so cheap. Maybe for area like this few bulbs would be just enough?

Maybe someone can give me a link for what I'm looking for ?

BTW I can't find any decent article about how much LEDs you need.

Thanks for any advice. Cheers

well i just use a 90w ufo led grow light 5 band as well. I did buy these light bulb cages for a few CFLS. I put them on the sides. The 90w ufo did very nice. for the top of the plants. I have a grow box similar to yours. I do Scrog every time with my g boxes.

Good luck

make sure u get 3w leds. if its the chinese stuff, quality can be a concern. make sure they have optics on the led..

The working current on that model is only 300ma which means those are 1 watters.