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You don't want to go higher than 250w in that tent. I am running a 250W MH in exactly the same setup and it is more than enough. If you go higher wattage you will have heat issues. Just grab the bulbs from your local electrical wholesaler., you will get both for less than the price of one bulb from a grow shop. If you have the time and feel capable, google how to wire a ballast for either MH or HPS. Then buy the ballast ignitor and capacitor at your local electrical wholesaler too. Otherwise just order a digital ballast most will run 250w, look for a model with a fan that cools the circuit board. Feel free to ask for help if you get stuck.

6 day update

In that space I would go with a 250W HID MH/HPS. Over 300W it is highly recommended the grower use Co2 in their room, your plants will only be able to photosynthesise a certain amount of light before needing a Co2 boost to benefit. Co2 is just not practical for your use. Most magnetic ballasts can flip between MH/HPS these days. If you are willing to do some DIY, you can grab the bulb, ballast, ignitor and capacitor for around R600`. For a timer it is another R300 +- and a budget reflector from a grow shop is around R400. Total for the whole system around R1300 +-

Haha whilestoned, I find that's the only time I like working in my tent... Granted, it takes 3 times longer, but it doesn't matter :) Sent from my EVA-L09 using Tapatalk

Based on this I've decided that I'm going to remove the one panel to the other side, run a total of 4 panels in this tent of two of the 600H mean well drivers, dimmed down and gradually increased when in full flower they'll be at 1000 watts (250 watts per board). I have a spare board (320 watts ) and a 320H mean well driver which I will use in a new small veg/clone tent dimmed all the way down. Edit: Sorry I can't math today, total power will be 1200 watts when running full steam.

Wow heavy wattage. In veg you can dim it to 40% and still be effective and gradually increase from flower. IMO - My whole outlook on QBs is their efficiency. But ja thats just my two cents

@Prawnapple, Where are you based? I've got a brand new 400/250 W HPS enclosed unit that I never used.Magnetic ballast,reflective hood, all enclose in a box with a glass front, just a big security light.

It's too early. Give them another 2 weeks. Sent from my EVA-L09 using Tapatalk

Dont know where you got the info that's it's highly recommended to use co2 on any light over 300w , that's just wrong. I personally ran 4000w without co2 suplimentation for years with beautiful results and the sun is definately over 300w

A month in and the Chocolope is well on their way with another 9 a week out of the soil. The kabbalah didnt make it. The seeds were too old I guess.