9.5W Cree Soft White 2700k Bulbs [not Warm White 2700k]

Discussion in 'LED and other Lighting' started by Abiqua, Nov 10, 2013.

  1.  
    tags420

    tags420 Well-Known Member

    Higher CRI chips have more a broader and more balanced spectrum that incorporates more deep red. High CRI can be used to get more deep red into a spectrum with basically the same chips. But you sacrifice a good amount of output efficiency when using them.
    this thread went into CRI a pretty good.
    http://www.rollitup.org/led-other-lighting/743645-cree-cxa-analysis-3.html

  2.  
    Abiqua

    Abiqua Well-Known Member


    Edit: The bulb on the right is a SW the left is a WW. Crazy how different the heatsinks are and the diffuser cup on the SW's? Which leads me to believe why it has a better top down, that you are alluding to, tags?
  3.  
    psilocybindude

    psilocybindude Well-Known Member

    That bulb on the right is not a soft white a19 that's from a br30 with xbs in it, br 30s are flood lights which is why they have that reflector right under the leds and its also why the chips are orientated the way they are, its because the xpes provide better illumination to the bottom of the bulb when they are orientated at that angle, which is better for a flood light.
  4.  
    Abiqua

    Abiqua Well-Known Member

    ^Oops, well I just looked and my SW's. are crystal copy of the bulb on the right. Didn't realize how much different of a heatsink it had than the WW. Even the diffuser and the way the diodes are mounted to my naked eye [ie. earlier crappy photo] are exactly the same!

    Strange.

    Im not a betting man, but those physically appear to be the same as the SW 2700, now as far as diodes.......
  5.  
    psilocybindude

    psilocybindude Well-Known Member

    I believe they would be the same diodes because the only reason they are using them is to achieve better over all illumination of the bulb and possibly some energy star crap, the xbs provide most of the light from the sides which is why they are better when they are angled like that...
  6.  
    bondoman

    bondoman Member

    I'm so confused. I found the warm whites hiding being the new soft whites, thinking I scored the xt's I bought 10 of them and popped the globe off one. XB's inside. So they're putting the same XB bulb in the old and new packaging with differing SKU numbers. Fuggin Cree, had me all excited.
  7.  
    psilocybindude

    psilocybindude Well-Known Member

    That sucks but that's exactly what redcarpet confirmed in the captians thread a while ago > < they are selling the xbes in both packaging, i had originally thought that these leds were a god send and so much better than buying an LED panel, but I'm starting to think the hassle of this is to much to bear.
  8.  
    Abiqua

    Abiqua Well-Known Member

    ^ For me it is almost a no brainer. I have Small cabs and funky footprint. But they were already wired for CFl sockets. So it was easy to just buy the bulbs [spendy] but worth it I think, now in a year, I am already re-thinking that, but fuck it, that's a year away for now, lol......

    The xb's aren't that bad in comparison to growing with a Chinese LED panel :eyesmoke:
    I still prefer cabs over tents, but the next one might be for one of those new-fangled A51 190's? or a couple of Hans [if they were less blue] ....choices
  9.  
    Abiqua

    Abiqua Well-Known Member


    I can't tell much of difference with the eyeball spectrometer, but has anyone posted up differences between the 2700k's spectrums? The soft whites seem to have a better designed heatsink and @ the current their driven, the xb's put out enough efficiency to get around xt's? So I don't think it is all that bad.......[even though I was skeptical too, plants still love the lights and way fawkin better than the cfl bulbs too]
  10.  
    bondoman

    bondoman Member

    I'm sure the XB's will be fine. Just on paper they seem a little worse, but not that much different. It's just that the XT's are good and proven.
  11.  
    psilocybindude

    psilocybindude Well-Known Member

    I thought the main advantage of the xts over the xbs was the efficiency not just the spectrum, i think some one told me in captians thread that the xte leds were a lot more intense so much so that it was like having multiple small HID's, but i don't know how true that is or was, i looked up a lumen chart for HID and compared it the crees and i will say it takes a lot of crees to add up to anything HID, but i know its about lumen's...

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