A thought about selling second hand LED units

Discussion in 'The Sump' started by Ridwaan, 1 Jul 2016.

  1. Ridwaan

    Ridwaan

    Joined:
    8 May 2007
    Posts:
    2,689
    Likes Received:
    66
    Hi Guys,

    I had a thought in my mind regarding the sale of LED lights second hand..

    Now, LEDs are rated for 5 years life span...With this in mind, shouldn't the price drop drastically if sold second hand?

    For example if the unit/s are say 2 years old, then they have like 3 years optimum life left in them.
    Then the price should drop by 40%...Im giving them 20% per year over 5 Years...lol

    Also when buying LED units, one should keep the invoice, so when selling them it can be used as proof of age of the units...

    A lot of factors to think of but was just a thought on my mind...lol

    This goes for the sale of second hand T5 and MH bulbs..An invoice would prove helpful...
    Else the bulbs should be given away for free...lol

    Cool
    Ridwaan
     
  2. AdS Guest




    to hide all adverts.
  3. mariusmeyer

    mariusmeyer

    Joined:
    7 Jul 2009
    Posts:
    3,054
    Likes Received:
    210
    Location:
    Jukskei Park, JHB
    Where do you get this from? LED's are rated at 50000 hours so at a 12 hour per day @ 100% will give you 11.4 years. Running them at lower percentages will give you even more time.

    For an example, Vertex rated their running time at 60,000 hours ar a core temperature of 125 degrees. But they only run them at 750ma with an approximate core temperature of 105 degrees. So that is 19 percent lower so should extend the lifespan by at least 19%.

    So on that calculations of 60000 hours, add 19% which will give you 71400 hours. At a 12 hour per day cycle will give you 16.3 years. So according to your depreciation calculations their prices should only drop by 6.13%. :-D
     
    Last edited: 1 Jul 2016
    mukesh and Christo like this.
  4. Adrian B

    Adrian B

    Joined:
    16 Feb 2014
    Posts:
    146
    Likes Received:
    29
    Location:
    JHB
    Well if Marius's example is correct Radions are cheap at the price if you consider they could last 16 years.

    The initial outlay however is another story.
     
  5. 459b

    459b Moderator MASA Contributor

    Joined:
    12 Mar 2008
    Posts:
    9,748
    Likes Received:
    789
    Location:
    Cape Town
    Doesn't running temp also play a huge role in lifespan of LED's? The time given by manufacturers will be under absolutely ideal conditions, so how will running them slightly too warm effect things..will it halve their lifespan, less, more?
     
  6. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,163
    Likes Received:
    1,231
    Location:
    Centurion
    As with all other marine equipment, do not expect to get all your money back the day you decide to pack up.

    But yes, theoretically, LED's should not drop that much in second hand value. Yet looking at the for sale section Radion Gen 2 goes now for about 3000 to 3500 secondhand. They were 8000 to 9000 originally.
     
  7. 4age

    4age

    Joined:
    23 Feb 2010
    Posts:
    3,547
    Likes Received:
    106
    Location:
    Cape Town
    with the current prices on international brands...maybe guys must consider adding inflation costs when selling units:lol::lol::lol:

    I was considering upgrading my lights and selling my units until I saw the costs for replacement lights 25k for a light unit is a bitter pill to swallow
     
    459b likes this.
  8. Ridwaan

    Ridwaan Thread Starter

    Joined:
    8 May 2007
    Posts:
    2,689
    Likes Received:
    66
    We will not know until we ask...lol

    So in other words, LED units can last 10 years.
     
  9. RiaanP

    RiaanP Moderator

    Joined:
    11 Aug 2008
    Posts:
    23,163
    Likes Received:
    1,231
    Location:
    Centurion
    supposed to.
    Anyway, longer than a lot of systems.
     
  10. EFJ

    EFJ MASA Contributor

    Joined:
    13 Sep 2011
    Posts:
    1,537
    Likes Received:
    278
    Location:
    Dwaalboom 60km's from Thabazimbi
    The LED life span ratings are according to using the LED's at 100% 12hours per day. Also what most people don't know is the rating is for them operating at 100% over the said hours and then it will systematically loose about 5 to 10% of it's strength for another "said hours" and so on. Also that 5 to 10% is so small that we won't notice the difference. So actually our light units should last more than our human lifetime.
     
  11. EFJ

    EFJ MASA Contributor

    Joined:
    13 Sep 2011
    Posts:
    1,537
    Likes Received:
    278
    Location:
    Dwaalboom 60km's from Thabazimbi
    But like any electronic item anything can go on and on and on.... or you can have a brand new item running for a couple of minutes.
     
  12. Ridwaan

    Ridwaan Thread Starter

    Joined:
    8 May 2007
    Posts:
    2,689
    Likes Received:
    66
    Interesting information...thanks guys...
    More input welcome...
     
  13. aslam

    aslam

    Joined:
    24 Nov 2007
    Posts:
    671
    Likes Received:
    7
    Location:
    Pmb
    Nobody's forced to buy a led unit second hand.
    If you like the condition and price, go ahead and buy it.
    Shop around and check the prices of brand new units they are certainly not cheap.
     
  14. Frank

    Frank

    Joined:
    7 May 2007
    Posts:
    71
    Likes Received:
    4
    Location:
    Durban
    LED manufacturers like Cree and Luxeon etc only stipulate 50 000 hours at Minimum flux values. This is usually around 350mA for an average chip. Aquarium lamp manufacturers on the other hand (particularly the Chinese) will run that same chip typically between 700mA to 1000mA in order to give the aquariast the maximum possible Luminous flux. Of course it stands to reason you will NEVER achieve the lifespan.
    You will see that the higher end (German) quality fittings usually incorporate a larger number of chips running at a lower forward current to achieve the same effect. Bottom line is we pay way too much for Chinese fittings in my opinion. But then this is Africa! :)
     
Recent Posts

Loading...
Similar Threads - thought selling second Forum Date
Thought I'd pop in and say hi New Members 24 Jul 2016
Thoughts please General Discussions and Advice 13 Jun 2016
Thoughts on caulerpa in sump General Discussions and Advice 13 Jun 2015
Thought i'd share my trip today to Genoa Aquarium with you all General Discussions and Advice 2 Oct 2014
share your thoughts? Lighting 12 Jul 2014
Phosphate thoughts. Water Parameters and Additives 24 Apr 2014
thoughts on montmorrillonite clay General Discussions and Advice 24 Feb 2014