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Just found this: http://www.ebay.co.uk/itm/POWERPLANT-400W-MH-VEGATATIVE-BULB-METAL-HALIDE-400W-POWER-PLANT-/140676459666?pt=UK_Light_Bulbs&hash=item20c0f86c92 It says this bulb can be used on HPS control gear.

I cant seem to find any conversion bulbs in the UK

Can you use a MH 400w bulb with the ballast I will get with my 400w HPS or do I need a switchable ballast

bump /..

What kelvin do i want for a veg MH Bulb. I was looking at a 4000k bulb. Many thanks

haha cant believe this thread is still going

May not be true plants can absorb 5 times the amount of c02 in the air itself and thrive greatly. To a human high c02 levels can make it uncomfortable to breathe etc.

welcome to RIU

Looking good, keep it up

you may have a fungal disease from over watering called Damping Off

they look really healthy, vibrant green leaves. Keep it up.

it can be used, but i've never tried it. And its true urine is high in nitrogen. Im still sceptical about the method though.

Should be okay but if your that worried, pierce a hole in the bottom of a bottle filled with water, it should drip and water the plant.

Most likely ballast issue... ouch

420... 24/7 :)

I would say they should be fine.

Looks like nute burn to me...

Looking good so far. keep it up

Never grew it, but I have smoked it, Very potent and gets you stoned out your cranium :D

I wouldn't advice but hey, It may just be worth it.