a few lighting questions

hey everyone. I know theres probably a lot of questions going around about lighting on here, but I searched the forums and could not find exactly what i needed.
I plan on growing five plants soon, probably something like 20 square foot area. I planned on growing entirely with high pressure sodium lights, but now I hear that they do not supply enough blue light to support the veg period.

Also I cant find any information or charts for lumens for different wattage hps lights. is there a standard number or lumens for say a 250 watt hps?

so does anyone know the lumens for a 250watt hps? would a few (and how many exactly) 250watt hps lights be sufficient for the 20sqft-ish / 5 plant set up? thanks in advance

hey any answers??

flipregression said:

hey any answers??

Click to expand...

Well i can tell you that you don'tneed 20sqft for 5 plants more like 8sqft and thats if they are big,

Hps is fine for veg it will just take longer

And most 400watt lamps give off near the same amount of lumens so don't worry about that

lumen output is dependent on the bulb. different bulbs have different lumen output and "more lumens" isn't necessarily better - it also depends on the spectrum of the light. Since i don't know dick about this - i rely on the bulb manufacturers for info. but i've attached some light guides others have posted on this forum.

Twenty square feet ( W x L ) or twenty cubic feet ( W X L X H ) ?

most grow guides i've seen/read recommend MH for veg and HPS for flowering.