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  1. whazzup

    Gavita Pro Fixtures With A Solis Tek De Metal Halide Bulb?????

    Hmm.. just came across this, not much time to spend on the forums nowadays ;) I have just two problems with the Solistek MH DE lamps: 1. They are not ANSI /O lamps (so they are not suitable. or even legal in commercial operations, to be used in open fixtures) 2. They send them out to Gavita...
  2. whazzup

    Watts/lumens per square foot ?

    If I knew I would! Hortilux is a good lamp, can't really go wrong with that if you use an appropriate ballast. You can run them reliable from a magnetic CWA ballast too of course. Magnetic ballasts give no problems with any lamps, and HortiLux recommends low frequency. Do use a good ballast...
  3. whazzup

    Watts/lumens per square foot ?

    nope, made for horizontal use and it would defeat the purpose of the double ended lamp as you will need to run a wire to the bottom.
  4. whazzup

    Plasma lights tell me more

    plasma lamps with the 41.xx series emitters need to be used aiming downward +/- 60 degrees. The light density is very high, higher than HPS. Penetration in the crop it really good and this effect is enhanced by the different shape of the plant and the positioning of the leafs under plasma light
  5. whazzup

    Watts/lumens per square foot ?

    wow.. lots of questions. just had a few busy weeks before, during and after spannabis :D let me see, Tony wants to know about life, the universe and everything. The answer is 42.;) Tony it depends on the room size and shape. Rooms are seldom built to suit specific lamps, it's mostly the...
  6. whazzup

    Watts/lumens per square foot ?

    I'd go with a bit more distance and deep configuration to get the best penetration, specifically if you grow larger plants (or per your gf preference ;)) But you might need a lot of distance.
  7. whazzup

    Watts/lumens per square foot ?

    I don't know, I don't know how this influences the ppfd, I can't predict that, and since I've never done it myself I don't know by experience. I would thing you need a lot more distance. I'd say more like 2' at least, if not 30". You have 1200W in one fixture!
  8. whazzup

    Watts/lumens per square foot ?

    i have no idea, I never worked with bat wings. If you use AAW take a little more distance and keep them in the deep setting for (imho) best result.
  9. whazzup

    Watts/lumens per square foot ?

    lol well either that or create your own reflective walls in your room. It would be a waste of light to just hang two lamps without reflective walls to shield the areas. Moreover it is much more efficient to create one field with some overlap. How are you going to install your tables? A drawing...
  10. whazzup

    Watts/lumens per square foot ?

    in a 3x3 tent, 6x pro 1000 light at 1.95, you get 1201 umol avg@ 1.3m, 1120 umol avg @1.1m, and still 930 umol avg at 0.5m. That 1200 is about the predicted 6x2000 umol / 9m2 -10% wall losses at 65 cm from the reflector. At 115% you would have 1300 umol avg at 1.1m crop height with over 90%...
  11. whazzup

    Watts/lumens per square foot ?

    What do you mean O/C? it'really easy to see: the spread is wide so on that surface they hang in-line, a bit further apart you would reckon. So if you want me to calculate what the light levels are on a sub-optimal installation you need to give me the exact position and direction of the fixtures...
  12. whazzup

    Watts/lumens per square foot ?

    That's the radiant power incident on a surface.
  13. whazzup

    Watts/lumens per square foot ?

    I'm sorry what's the measurement of your room again? I deal with many people and many measurements, I don't memorize them all :D
  14. whazzup

    what size lights

    Personally I think a Pro 1000 for a 4x4 is a lot of overkill if you run it at 1000W. A 600W would be a bit on the low side (<900 umol avg). For 4x4 actually a 750W/825W would be a great choice. Fortunately the Pro 1000 is still very efficient at 750W (1.86 umol per watt, 1.92 umol per watt at...
  15. whazzup

    Watts/lumens per square foot ?

    my pleasure :)
  16. whazzup

    Watts/lumens per square foot ?

    1000W on 4x4 should be imho overkill. But at very high light levels it is harder to obtain a gram per watt than with lower intensities and a bit bigger room. So if you would know your light intensity you would be able to make that decision. Buy a micromol meter, even a cheap one will give you an...
  17. whazzup

    Watts/lumens per square foot ?

    btw uniformity is overrated, but bad overall uniformity can be a problem. If you see some hang their lamps ;)
  18. whazzup

    Watts/lumens per square foot ?

    well, fortunately we can agree to disagree. But I am really interested in the ppfd measurements under your hoods in that 8x8 area with the distances. I think you would agree that adding another 1000W lamp would be a bit much on that surface? Because basically that is what you do when you...
  19. whazzup

    Watts/lumens per square foot ?

    You will never see a difference in a room, period, I would say. Your eyes are not capable of seeing such a difference at that intensity. Also look at the scale, that is a very small scale, going from 20-100 umol per colorsegment. A 90% uniformity is really not bad at all. On ICmag you can see a...
  20. whazzup

    Watts/lumens per square foot ?

    probably posted this here somewhere but this is how efficient it is to use high light levels. You can see that the optimum is way under 1500 and that 1500 can be regarded as the saturation level. going from 500-1000 gives you much better roi than going from 1000 than 1500. Also see what...
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