Yield and using a light rail?

[sontnewb]

I run with 3 600 watts hps to flower the last 4 weeks of flowering, how much would my yield drop if I use a light rail and drop down to 1 light? or I was thinking of mounting a bracket to the light rail and mounting 2 lights to it for a wider more even coverage..

 

[DoctorGonzo]

Rails aren't very efficient, and 600's are only 95k lumens to begin with. Drop 2/3 lights, add rail, lose 65% of yield. Drop 1/3 lights, add rail, lose 25%*

* +/- 5%

 

[Pipe Dream420]

Gonzo has a valid point.

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[DoctorGonzo]

Rails increase efficiency maybe 5%, using 1000w bulbs. Using a 4' rail, you only move the light 6" each way off of center, max. In other words it's a waste of $200. I could see in certain scenarios (a MASSIVE commercial SCROG) using DE bulbs (Gavita Pros) where moving light might yield better #s, but generally there's no need to move light you just need a geometrically sound prime light footprint.

 

[sontnewb]

scrap that idea... the strain I have flowering i get 1 lbs per light now, wanting to drop my yield..

 

[DoctorGonzo]

scrap that idea... the strain I have flowering i get 1 lbs per light now, wanting to drop my yield..

454g/600w = .75g/watt, which is dandy .
If anything, try to get to 1g/watt by increasing efficiency.

 

[Pipe Dream420]

Word

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[XobeMan]

I want to get a pound and a half per light wheni grow.

A Licenced Medicinal Cannabis User

 

[DoctorGonzo]

I want to get a pound and a half per light wheni grow.

A Licenced Medicinal Cannabis User

You'll have to use 1000w HPS HIDs. You'll also want to run majority bulky indicas, avoid Hazes, and make sure if you're using a tent that you've got 6'x6' per 1000w to maximize efficiency.