Diy hps light with remote ballast 4 $25.00

smokiedog

Well-Known Member
So this is pretty basic, I took pics so I could show my buddy, not intending to do a diy thread. But it came out pretty good so here goes... feel free to ask questions if I missed anything.

This is a DIY 100 watt HPS light with remote ballast and hood.

This can be scaled up for any size HPS, but you will need to scavenge a different box if the transformer doesn’t fit.

Materials
Power supply from old computer
Hps outdoor/security light
hps bulb
Computer power cord
Lamp cord
Shop light hood
12 inches of #8 threaded bolt stock (or 4, 4 inch #8 bolts)
Washers, lock washers and nuts
Couple of chains to hang the light
Metal coat hanger
Drill, hack saw, adjustable wrench and a few screwdrivers


First gather the parts… for the HPS stuff you have a few options:

EBay
Craigslist
Electrical supply warehouses
Home depot/lowes or other hardware store

eBay always has a ton of hps stuff for sale cheap. But you have to keep looking to find good deals. If you can get the wattage you want for sale as an outdoor light or security light, just make sure it’s a “ballasted” hps light. You’re basically looking for an hps security light that you can gut and reconfigure to a remote ballast.
Sometimes I will search hps 100watt instead of hps 100 watt. The auction with no space between 100 and watt is a typo and doesn’t come up in many searches so it gets less bids and will sell for less, also I always wait to the last hour to bid.

Craigslist can be hit or miss, but there are hps lights or "security lights" on craigslist fairly often, as many people are "going green" and converting there HID outdoor lights to more economical fluorescents. I recently saw a posting on CL where a local contractor was selling about 50 hps lights at 30.00 a piece. They had just removed them from a commercial building due retrofitting with more efficient lights. They are out there, you just have to look. Gymnasium lights often are HPS lights as well.

Electrical supply warehouses, check the phone book or yahoo yellow pages. Most small to mid sized cities have a few. If you’re in a remote town in the middle of nowhere this may not be an option. If you can find one, just tell them you need a transformer, igniter, capacitor and mogul socket for whatever watt size light you want to build. They may or may not have a wiring diagram but they are easy to find on here or on the net. Sometimes there is a decal on the component itself with a wiring diagram. There are also "pulse start" in which there is no capacitor, just an igniter.

Home depot/lowes or other hardware store: I would use this option as a last resort, but I have seen them on sale for $40 or $50 bucks, sometimes less. Just check out the outdoor lighting isle and look for a deal.

Most of these come with the bulb, but I have seen them on amazon.com for as low as $7 (I know, there are those of you that will swear up and down that the hps bulbs off the shelf at home depot or lowes aren’t the same or as good as the $50- $120 grow bulbs, they may not be but they work just fine for me, nice thick dense budz)

Once you have the hps components you are ready to go…

I used a 100 watt hps security light components that I got on eBay for $25 delivered. I mounted the transformer and pulse start igniter in an old pc power supply box. (Please note that I used an empty box, I didn’t just plug the hps light into it). Gutting the pc power supply was easy; just leave the terminal in there so you can still use it to attach the power cord. I used this box because it has plenty of vents and holes to let the heat out. I then used the existing pc power cord to power it.
The transformer has 4 holes going through it, I cut the bolt stock into 4, 4 inch sections and mounted the transformer an inch of the bottom of the pc power supply box, this way it’s not touching any walls of the box and disperses the most heat. Use the washers, nuts and lock washers to secure it in there.

I used a 14 gauge lamp cord to make the mogul socket remote. You could just use a ballasted security light right out of the box by just adding a power cord. But the ballast gives off a lot of heat and it’s not as mobile for adjusting height as just a bulb with a light weight hood is.

If your relatively handy and know the basics about electricity this is pretty straight forward. This 100 watt light would be perfect for a 1 plant or a micro or lst grow. I added a hood that I made for free out an old shop light hood. Just trim the hood to the desired length and drill a few holes at either end. I bent a metal coat hanger to make hood hangers at either end.

I use this light as an extra light with my 400 HPS. I ended up with more females than I had planned and needed more light!

If you have any doubts about your ability to wire this, don’t do it or get help from a friend that knows (or ask for help on RUI) - faulty wiring can cause fires. The biggest thing is making sure it’s hooked up correct and there are no lose wires or bare/exposed wires. If it’s hooked up wrong it just won’t work, if it’s hooked up correct with bad connections that is where bad things happen, check all connections twice and then check again! Get the screw on wire nuts and use electrical tape to make sure no wires (no bare copper) are exposed anywhere. Also, never place anything on, above or near your ballast. It needs air to vent its heat. I keep my ballasts out of the grow area to keep heat down, that’s the whole point of making this a remote ballast.

Hope somebody can use this info, feel free to ask questions or post your own diy hps ideas or pics!
 

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smokiedog

Well-Known Member
it would only let me add 4 pics at a time... here are a few more. i will add the pic with the hood later (its not with me)
 

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smokiedog

Well-Known Member
this is the hood i built for it, i have a better shot of it from the front/top view but i cant finf it now... baked .. its just a piece of shop light hood, actually its an office light hood, from florors that are recessed in drop ceilings.... anyway i'm rambling...

here is an up skirt shot. this pic was taken from under the light as it is hanging from the ceiling. you can see the refletions of the plants underneath them.

i'm switching this pic to my profile....
 

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tom__420

Well-Known Member
That is an awesome pic smokie, if there wasn't those lines it would be damn near perfect haha. I really like the diy man
 

smokiedog

Well-Known Member
thanx tom420, yeah those lines suck, they are from the 400 watt about 18 inches away, shes just waring up. its tuff getting both analog timers to start at the same time. so the 400 comes on about 5 minuts before the 100 watter and the 100 shuts down 5 minutes after the 400
 

smokiedog

Well-Known Member
just an update... its been over a week now since i put the home made hps remote ballast into 12/12 and she is working like a champ.
 

Furthur

Active Member
I'm doing the same thing with a 400w MH high bay, but I hadn't considered gutting the ballast from its housing and putting it in a PC power supply. The housing it came with is so dang bulky / heavy. The power supply would be nice with the fan for cooling as well. Nice job.
 

slipperyP

Well-Known Member
That DIY is the shit...+rep for sure. I just tossed an old ass computer....All i took was the fan. Not next time. Will this work for a 600 watt?
 

That 5hit

Well-Known Member
im sorry but can you start over and do a step buy step, picture by picture (most important) of every detail about wireing what goes were things like that you gave a lot of info but more pics would of helped ied like to try this
thanks in advance and also what type of light can i put in it you use a 100w but can i go bigger if so how much bigger
 

born2killspam

Well-Known Member
If you've ever stripped a pc power cord you'd know the copper is extremely puny.. I only use those for 2-3 amps max.. If scaling this up I'd get heftier cord..
Also, grab a phone book and call up electrical/lighting outfitters like Westburne etc.. I used to get everything for 400W kits from them for about $55cdn
 

That 5hit

Well-Known Member
i guess the only way to realy understand what you guys are talking about is to outright buy a complete light system first then realize that i couldve gotten everything cheaper in parts or DIY because i am still lost
so cfls for now thank anyway
 

born2killspam

Well-Known Member
i guess the only way to realy understand what you guys are talking about is to outright buy a complete light system first then realize that i couldve gotten everything cheaper in parts or DIY because i am still lost
so cfls for now thank anyway
+rep dude..:) Thats kind of the point exactly..
 

crazy7605150

Well-Known Member
i was ganna do the same thing but i was ganna use two 100 watt ballast... how hot does it get in that box u made??? would it get to hot for 2 ballast and 2 ignitors??? my power supply box barely is big enough for both of them to sit in there... they are touching each other and the sides of the box.... im assuming that its too hot but dont know... didnt want to hook it all up to find out its to hot
 

crazy7605150

Well-Known Member
yeah i found another power supply and gutted it out now i got 2 100w ballast set ups..... well almost done had to go to work b4 i was done ... its to late now... tomorrow i got somthing to do now
 

BudJunky

Well-Known Member
So just wondering what the amperage rating on this would be? Sounds to be about perfect for my up and coming mother room.
 

born2killspam

Well-Known Member
At 120V a 100W HPS will draw about 2A or more during startup, then drop down to a constant draw of about 1A from the mains..
On a 240V line, those numbers get cut in half..
 
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