low priced HPS ballasts

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#21
400 watt HPS retrofit

Hello, I just ordered the magnetic 400 watt s51 HPS ballast for $28.99 form the seller on E-bay, great deal. I was struggling to find an affordable metal halide lights source, Not too mention how big most are, this sounds like a good way to go. Although I am having a heck of a time finding the retrofit bulb for the HPS ballast.

Please Help me Scotty, I need that power now!!!! Before my dilithium crystals fade and burn out!!!!
 
#25
ground wire

The whole point of a ground wire is to provide a path for the current if something shorts to the hot wire. For example, if you made your projector from metal and somehow your hot wire's wire nut popped off. The wire could contact the gounded metal enclosure, and the excessive current would pop a fuse or trip a breaker. If the same thing happened without the metal box being grounded, then you would have a "hot chassis". If you touched it with one hand, and touched something grounded with the other hand (ie. telephone, water faucet, or something that was properly grounded) then there could be enough current flowing through your chest to kill you.

If there is no exposed metal on the outside of your projector, then the ground wire is not quite so important. But of course, you would still have external signal wires going into the box, so you could still have some problems if you have a short.

If you want to be really safe, you make a metal cage around all of your 120 VAC components (switches, ballast, lamp socket, etc.) and then connect the line cord ground wire to that cage. Or you can just connect the ground wire to one of the bolts that mount the ballast, if you have high confidence in your own wiring. Then a ballast short will trip the breaker.
 
#26
i am really thinking about getting this ballast the only thing i worry about is the lamp is UHI-S400DD USHIO the only lamp that will work good for this project and with that ballast ? i saw some where that it is 33000 lumens is that right ? since im only useing a OHP with a 600 watt holagen i would assume that 33000 lumes would be much much brighter than i have now.
 
#27
Yes to both questions😉 It is the best and maybe only bulb and it is much much brighter, and cooler. The heat is my biggest problem with halogen lights. I bought this light, but haven't had the lcd to use it with yet. I have been told it is much cooler though, so I have big hopes. Your 600w halogen probably puts out around 4000 lumens. So you will have like 25,000 more lumens. But, the amount you can get to your lcd maybe dimished because of excaping light to different directions??? Still should be much brighter.
 
#28
v1d9uy said:
i am really thinking about getting this ballast the only thing i worry about is the lamp is UHI-S400DD USHIO the only lamp that will work good for this project and with that ballast ? i saw some where that it is 33000 lumens is that right ? since im only useing a OHP with a 600 watt holagen i would assume that 33000 lumes would be much much brighter than i have now.
Click to expand...


Miedosoracing said:
Your 600w halogen probably puts out around 4000 lumens. So you will have like 25,000 more lumens.
Click to expand...

Assuming your using the standard DYS 600W halogen that is pretty common, in my Apollo AI-1000 etc. It puts out 17,000 lumens. 33,000 is the spec I found for the Ushio, so still your a little less than doubling your light output, which is significant.
 
#30
Well, is this your bulb?

http://www.topbulb.com/find/Product_Description.asp_Q_intProductID_E_43769

http://www.bulbconnection.com/ViewItem/bcrw/itmid/263/oc/Osram%20DYS%20Replacement%20Lamp/item.html


As far as comparing to the pics goes... (I don't want to get in a flame war about this with anyone, but cameras will see things differently, and depending on the exposure etc. a person can make their picture look much better than things are in real life.) Also Halogen is very yellowish so it can appear darker to you.
 
#31
I was kinda thinking the same thing. For instance, a 100w bulb puts out around 1500 lumens, 300w - 2000, 360w - 3200, 410w - 5000. These are rough estimates, but the jump to 600w is kinda a lot. I would think by looking at these numbers, maybe more like 7000 to maybe 10,000 at most. I bet that baby is freakin hot too. I have a 410w and it is blazen
 
#35
Ok, then my question is, I am running the 410w 82v, and have burnt 5 out in messing with this project. I have kept the 300w 120v and had to put it back in again last night. I am not buying those 410w again. But maybe it is the 120v verses the 82v. The filiments are thinner. So the question is, if I run one of those 600w babies, and turn the juice down to say 80v, would they last much longer, and still put out the same as the 410w. And would the heat be about the same as the 410w? This is my 5.6" tv, and I am not gonna waist a halide on it now, after all I have messed with. The 15" is gonna get the halide
 
#37
it would be so sweet if someone posted a pic of how they wired the 28 dollar ballast from ebay..........

i just want to see a clean, tucked and neat job and show a good way to ground it and stuff.

of course, i would always unplug my whole projector when not at home seeing how this is all experimental....
 
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