20 x 45 ft new room.

[compliant]

Lighting recommendations?

I want to go with some DE HPS, not sure which system though.
How would you lay the room out? I'll post some pics of the construction here in a minute

 

[Picarus]

The company selling the fixtures can help you. You should already know this, as thats a big space and you should have a budget before you started. "Proper planning prevents piss poor performance." -Mick D.

 

[CoCoSativas]

I like big hoods with even spreads. Adjust a wing makes a de version... Ive heard lots of happy people raving about those wings. Well made for sure.

The gavita pros are pretty amazing too. Great in big spaces.

I have a few parabolics and gavita digistar 600s for my next project. A much smaller project, but that setup coves a sqare meter evenly and is cheaper than the pro fixtures. I like 600s over 1000watt fixtures. Personal preferance. If you want de though, they only do 1kw right now...

Im using a digistar to power my hortilux 600 in cooltube in my tent. That bulb and ballast combo is working well for me. I am using this small setup for now...

 

[Nez]

32 lights (4 rows of 8) would cover that footprint nicely with double enders. subsystems de version throws one of the best patterns. There 8 inch air cooled but can be run without ducting obviously with a big enough ac/ ac's. they are a little pricey though. if your looking for cheap go with the adjusta wings and put your money you save into a bigger ac. Youl need it

 

[eighty9concentr]

Depends if your trying to go sealed room or not. I upgraded all my rooms to the sunsystem ac/de's and i love them. I air cool my lights, use a split ac, and co2 burners. If you go huge on the AC you can use gavitas which are killing it too. All the warehouse are going de now, makes a big difference in yield. Either way i would go 3 rows of 10 with each light over a 4x4 footprint. Thats leaves a 2' walkway in between the rows to get in there and work on the plants and 2.5' on the ends so theres room for ducting/equipment. With that layout and de, you should have no problem getting 75 per run once its dialed in. I went with nanolux de ballasts which are working great but my first choices were gavita remote ballasts or hydrofarm phantom de's but i wouldn't have been able to get them for a while because they were back ordered. If you are going de, put your order in asap because everyone is upgrading and buying them now and they are hard to get in large quantities.