Photo Video 375W 32 Inch Umbrella Light Stand Kit 3 Backdrops, $84.99 (Was $123.99, Save $38) @ Voilamart

10

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Associatedmelodyzz on 23/09/2015 - 15:01 voilamart.com (300 clicks)
Last edited 23/09/2015 - 18:05 by 1 other user

Where to find such a real bargain?

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3x 125W Fluorescent Spiral Bulb 32 Inch Umbrella Light Backdrop Stand Kit$84.99 w/ Free shipping(Was $123.99, Save $38)

Features
* Energy Saving 3x 125W/5500K Light Bulb (Come with 3 light bulbs, not 2)
* 32 Inch Soft White umbrella (soft and smooth spread of light & remove shadows)
* 32 Inch Black/Silver Umbrella Reflector(minimize light loss & maximize the light spread for contrast )
* Heavy-duty aluminum 2x3m Lighting Stand (height adjustment 72cm to 210cm)
* 1.6x2m Non Woven Backdrop (3 colors. black, white and green)

If you require better shooting, 100% COTTON MUSLIN 145gsm Backdrops are highly recommend. Only $26.99 for 3 Backdrops

You May Also Like:

2x 21W LED Light Bulb 32 Inch Umbrella Continuous Light Backdrop Stand Kit $99.74 (Was $132.99, Save $33) Only 10 Available.

Why should you choose “LED light”？
* 30000 hours lifespan - 10 times longer than CFL
* Save energy up to 70% of CFL, no mercury, no flicker

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• 

  Mahogany Granger on 23/09/2015 - 15:34

  Whats the difference between the backdrops you get here compared with the seperate 145gsm muslin ones?

• 

  llama on 23/09/2015 - 17:28

  +2

  3x 125W Fluorescent Spiral Bulb(1875W Equiv.)

  2x 21W LED Light Bulb(1500W Equiv.)

  I am not sure who is writing this stuff for them, but it needs a reality check.

  The so-called "green lamp" 125W CFLs are claimed to output 8,000 lumens and be equivalent to a 625W Incandescent.

  That puts the Incandescent lamp at 12.8 Lumens per Watt and the CFL at 64 Lumens per Watt…. not very accurate (the incandescent would be more than that, the CFL is probably less). But let's run with that.

  The 21W LED is claimed to be equivalent to a 750W incandescent. Based on the above, that means the Incandescent would be about 9,600 Lumens.

  OK - so if a 21W LED can put out 9,600 Lumens, that means 457 Lumens per Watt, which has broken quite a few laws of physics.

  There is also a claim that:

  Luminous efficacy of LED is 6 times higher than CFL's

  Which would make the LED have an Efficacy of 64 x 6 = 384 Lumens per Watt, which is still about 4 times higher than would be physically possible to achieve.

  The 21W LED lamp is sold on chinese websites like DX and DHgate and claims to be 2,000 Lumens. That's 95 Lumens per Watt which is probably still about 30% too high. But even if it really did output 2000 Lumens, that makes is "equivalent" to a 150W incandescent (not a 650W).

  In reality, it's probably more like this:

  750W Incandescent (halogen photography lamp) @ 25 lm/W = 19,000 Lumens

  125W CFL @ 50 lm/W = 6250 Lumens

  21W LED @ 80 lm/W = 1680 Lumens

  tl:dr; The CFL is unlikely to be 5 times more efficient than a Incandescent, and the LED is certainly not 6 times more efficient than CFL (or 30 times that of incandescent).

  None of that really matters, since you simply set a wider aperture or longer exposure to allow for the lower light levels.

  • 

    Associatedmelodyzz @ Voilamart on 23/09/2015 - 17:59

    Thank you for your kindly correction.