screen printing > DIY - From master engineered marvels to cobbled together jury-rigged or Jerry-built junk!
Cheaper LED's and a look into LCD for Exposure Split from Saati Screen Toaster Thread
ScreenFoo:
--- Quote from: Prōdigium on March 05, 2016, 01:15:31 PM ---A very interesting thread and project, still a bit on the pricey side though.
I live in the heart of LED production in China, after reading this thread I decided to do some checking around and I am shocked at how cheap these LED's are....I can get a box of 500 for $125 Each bulb is 5watt, puts out 395nm wavelength. Makes me wonder how companies are getting off charging $5000 for these things.
--- End quote ---
See also: EE/ME, light geometry, sensitivity/absorption curves, tariffs, patents, UL/CE certs, marketing, opportunity loss
:)
Maxie:
LED technology is not so simple.
Not all LEDS are equal, the basic LEDS are very cheap but they are usually not the right wavelength.
I am using the Saai 300w which is much cheaper and gives me good results iwih SBQ emulsion.
I'm using Saati PHU
Frog:
--- Quote from: Prōdigium on March 05, 2016, 01:15:31 PM ---A very interesting thread and project, still a bit on the pricey side though.
I live in the heart of LED production in China, after reading this thread I decided to do some checking around and I am shocked at how cheap these LED's are....I can get a box of 500 for $125 Each bulb is 5watt, puts out 395nm wavelength. Makes me wonder how companies are getting off charging $5000 for these things.
--- End quote ---
You should know from your pizza operation the difference between cost of ingredients(parts) and cost of finished product
jvanick:
--- Quote from: Prōdigium on March 05, 2016, 01:15:31 PM ---A very interesting thread and project, still a bit on the pricey side though.
I live in the heart of LED production in China, after reading this thread I decided to do some checking around and I am shocked at how cheap these LED's are....I can get a box of 500 for $125 Each bulb is 5watt, puts out 395nm wavelength. Makes me wonder how companies are getting off charging $5000 for these things.
--- End quote ---
think of it this way.. when you're printing a shirt, how much 'raw' material goes into the shirt itself?
15-20% of the total cost?
I think part of the deal with the cheap leds is likely quality control, that is, weeding out the ones that don't put out the same amount of light, the same spectrum, etc. if it was '1' led chip it might be a different story, but all the successful and long-running units now seem to be settling in on 'arrays' of leds.
Add in R&D, building, stocking, power supply dynamics, warranty provisions, etc, and your $300 in parts unit just got a LOT more expensive.
that being all said... if you can buy 395-405nm leds that cheaply, maybe it's a product opportunity?
Frog:
In the same vein, is there any doubt that many products that sell for a few dollars actually only cost a few cents? Think Chinese ad specialties.
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