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  • #16
    XYZDNL read my post #6. Where I have tried to explain it all. (probably badly)
    This is my thoughts on the subject.. forget the figures they really dont mean much. If you have replaced the lights whatever they are with measured lower power draw LEDs and you are happy with the result. Then all is well. happy days.
    Who has ever designed their lighting for their home and done light measurements and calculated the light level for each room???
    99.999 % of people just add light fittings until they find it looks harmonious to them then they add lamps of some description and wattage until the room reaches the desired lighting level.
    Some people want something close to daylight in every room some just like subdued lighting.. there is no right or wrong..
    In a commercial building /offices /workshops. manufacturing facility. things are different. but thats another story.

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    • #17
      Will be interesting to see if my wife even notices.
      Ha, my wife is one of those with the 4th set of cones, and can tell the difference of blue paint from the AM, to PM, out of the same can. And there are not many candelabra base halogen bulbs on the market. I'm allowed 2 LED night lights, because the 7w incandescents burn out too often. 6 months, when she's in the dark from dead batteries, perhaps the tune will change.
      Just found LEDtronics has a new LED color, 22000K "filament" - I'll have to try that one.
      Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
      || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
      || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

      solar: http://tinyurl.com/LMR-Solar
      gen: http://tinyurl.com/LMR-Lister

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      • #18
        22000k ?? I think but not certain and its possible im wrong but isnt 5500k "daylight" the desired colour temperature??

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        • #19
          Originally posted by john p View Post
          22000k ?? I think but not certain and its possible im wrong but isnt 5500k "daylight" the desired colour temperature??
          It's a more orange color than warm white, better for indoor ambient. (better for "She Who Must Be Obeyed", 'cause if Mama ain't happy,nobodys' happy)
          Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
          || Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
          || VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A

          solar: http://tinyurl.com/LMR-Solar
          gen: http://tinyurl.com/LMR-Lister

          Comment


          • #20
            Mike this is my point about this.. Your wife likes a certain type of lighting colour.. and thats that..
            You could have someone do all the light calculations possible. and "prove" what is "correct" but I bet you still couldnt get her to chage her mind.

            Thats why I say to anyone if possible try some lower power consumption LEDs in a room if you like the result thats fine, and now you will save some,but mabe not a lot of money.. You will if you have a dozen or two of the worlds worst light the 50w halogen MR16... Im sure those wasteful things were invented by a power company shareholder.

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            • #21
              Check out the Cree XML

              Sunking, I read some of your posts to my dismay (because you alerted me about the dangers of DIY panels! Thanks!). Anyways, I would ONLY use the Cree XPG or XML because they are about twice as efficient as the CFL (and last longer if driven properly). I'm talking 12v systems (and I want even [I]just[/I] 4 volts!). Each XML led mounted on a "star" costs about $9 to $11, then the driver, which I found at [COLOR="#0000FF"]led supply[/COLOR] (also) costs $20 but will power three XML's at 1.4A...
              Which equates to about 1,500 lumens. In this case, I guess I would need at least a 10Ah 12v battery, the battery protection electronics, and a 45 watt panel, just to power this thing (brighter than a porchlight) on a regular (and not having to worry about it going dim in just a few hours) basis!
              However, if a large solar/lead acid source was available, it seems that this would be the way to go, as it IS THEE most efficient (as far as I know)
              Here's the specs for the Cree XML
              http://www.cree.com/products/pdf/XLampXM-L.pdf

              And, again, thanks for "being negative" about the DIY because I was thinking (and still wonder) about a totally plexiglass encased (8Amp and 4v) panel...
              Without massive amounts of clean energy
              There will be no FREEDOM

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              • #22
                Originally posted by Mike90250 View Post
                I have frogs that bark
                I have deer that bark at me.
                NABCEP certified Technical Sales Professional

                [URL="http://www.solarpaneltalk.com/showthread.php?5334-Solar-Off-Grid-Battery-Design"]http://www.solarpaneltalk.com/showth...Battery-Design[/URL]

                [URL]http://www.calculator.net/voltage-drop-calculator.html[/URL] (Voltage drop Calculator among others)

                [URL="http://www.gaisma.com"]www.gaisma.com[/URL]

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