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Old 03-20-2004, 06:49 AM   #1 (permalink)
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Lightbulb Light?to Get Or Not To Get?

Would this be a good light to get off ebay?http://cgi.ebay.com/ws/eBayISAPI.dll...category=42225(copy and paste)
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Old 03-20-2004, 06:59 AM   #2 (permalink)
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i just bought that excact light last month. i got mine for 65quid here in the UK, im not sure of the price conversion exactly, but from waht i tell that seems to be a good price.

so far my little babies are lapping it up. what size is your space?
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Old 03-20-2004, 07:12 AM   #3 (permalink)
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umm...not to big, enough for like 4 plants or so. is that a good light and you got it from that same seller off ebay?
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Old 03-20-2004, 07:23 AM   #4 (permalink)
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nah, i got mine second hand off a seller in the UK. for four plants thats ideal. try and pick up a Son Agro lamp too for it, it will give you that extra edge for vegging with the added blue spectrum output. if i were you id buy that light

http://www.specialty-lights.com/9960.html
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Old 03-20-2004, 09:41 AM   #5 (permalink)
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yeah im just concerned on getting it shipped to my house! im trying to see if one of my friends will let me ship it to their house?
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Old 03-20-2004, 10:16 AM   #6 (permalink)
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kick that shit dude ! thats not what you want , look at the 600 watt hps for $215 , with blub if you do want to grow bigger this well be the best choice all around over kill for a 4 plant grow but a step in the right direction for a sound grower to improve his skills .....this is a prime light and why should you play secound best , do it right the frist time , and never look back ! ..... they are every bit as strong as the 1000 hps , and something few never under stand is the 600 watt can be closer to the plants with out over heating them this lets you grow taller plants in the same size grow ....and it is not illegal to by these lights , dude !
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Old 03-20-2004, 10:29 AM   #7 (permalink)
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sorry taz I have to say you are incorect that a 600 is better than that one. If you look at the PAR of the 430 watt sun agro bulb you can see it is the same as the 600 watt. In other words tyhe 430 watt bulb puts off as much usable light for your plants. Also one the bigger bulbs you have to keep the lights further awat from them. This also hurts. Look at the amount of light that a 1000 watt bulb puts off, at three feet away. You have to keep them two feet from yuort plants. Now look at the amount of light that a 430 put out, at 12-18 inches. You can see that having several little lights is much bettre than having one big light.
Of cource if you have the room and are growing ten foot plants then you will want the big lights. If not then several 400's are much better than one 1000.
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Old 03-20-2004, 10:35 AM   #8 (permalink)
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Quote:
Originally posted by tazz11
they are every bit as strong as the 1000 hps , and something few never under stand is the 600 watt can be closer to the plants with out over heating them this lets you grow taller plants in the same size grow
Well, I wouldn't say that are as "strong" for a pure, raw output but they are definitely the most effecient and put out more lumens/watt than any other light out ther, period. In fact, the numbers are in and a 600 HPS will put out 150 Lumens/watt vs. the 1000 HPS which is only 140 Lumens/watt

tazz11 is also dead on in that you can put the light closer due to less heat. Which in the end also provides more lumens per watt to your plants than a 1000. Due to the "Inverse Square Rule", light diminishes to the square of the distance.

Intensity = light output / distance(squared) ( I = L/D2 )

Here is an example:

Source Lumens = 1000

1 foot distance from source = 1 (1000 lumens)
2 feet distance from source = 1/4 (250 lumens)
3 feet distance from source = 1/9 (111 lumens)
4 feet distance from source = 1/16 (63.5 lumens)

And despite populare belief on the whole watts/sq. foot theory. It's not about the watts persay but lumens/sq. foot. It's all in the lumens! and that 600 will give you the best lumen "bang" for your buck.

Light 'em UP!
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Old 03-20-2004, 11:53 AM   #9 (permalink)
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Quote:
Originally posted by Sag Man

Intensity = light output / distance(squared) ( I = L/D2 )

Here is an example:

Source Lumens = 1000

1 foot distance from source = 1 (1000 lumens)
2 feet distance from source = 1/4 (250 lumens)
3 feet distance from source = 1/9 (111 lumens)
4 feet distance from source = 1/16 (63.5 lumens)

And despite populare belief on the whole watts/sq. foot theory. It's not about the watts persay but lumens/sq. foot. It's all in the lumens! and that 600 will give you the best lumen "bang" for your buck.

Light 'em UP!

This is why I agree that one high power lamp is better than 2 lower powered lamps.

ie. with 2 400W (well - say 2 500W even though they dont exist) lamps you could cover about the same sq footage as a 1000W lamp, however the light would not penetrate as deeply, and plants would need to be kept shorter.
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Old 03-20-2004, 02:08 PM   #10 (permalink)
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Quote:
Originally posted by BudBruther
This is why I agree that one high power lamp is better than 2 lower powered lamps.
I can understand your rational but I'm not sure that your reasoning is correct. Because you have to keep the 1000 about a foot higher or so than a 600 (depending on your ventilation of course) then you have already lost an extra foot of lumens.

Also, if you are using to smaller ones, in addition to being able to keep the light source closer, you are able to spread that light out and cover a broader area with full coverage. With only one light source, the edges of your garden would be drastically darker in comparison. The two smaller lights would have an overlap and provide for much better coverage.

Of course, this is all moot if you are growing an "industrial" grow where space, electricity, ventilation, etc. are not an issue. In that case, yeah, going balls to the wall with your lights is the right thing to do. These light sources evenly spaced would create the much needed overlap and with that kind of ventilation, you could easily keep them closer than mere mortals could think about.
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Old 03-20-2004, 04:11 PM   #11 (permalink)
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ok..first of all i dont think i need a 600w light on only a couple of plants! second the electric bill is an issuse, heat, and height are also issuses. i have two decent lights for vegging and just need one good HPS for flowering. does a 600w use the same wattage?...it cant could it?more watts more power right??another thing im on a budget and wasent tryin to spend $200+.i know its not illegal to buy these lights just dont wont to rise any suspicion.
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Old 03-20-2004, 06:04 PM   #12 (permalink)
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MY RATIONALE WAS THE YOU NEED MORE SUquRE FEET TO GROW x AMOUNT OF MATERIAL UNDER 2 SMALL (sorry for caps) Lights than under one large one, as the larger light can support taller plants. Therefore a 1000W is better space efficiant than two smaller lights. (area wise)

in the case of 600w, they apparently put out the most light per watt.
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