Lumilife 40 Watt High Output 595x 595 LED Panel $90.00 Shipping - $10.00 in Victoria

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  gizmomelb on 26/11/2015 - 18:31

  nice, could you use a daylight coloured unit connected to a solar cell and then use it as an indoor skylight? ie: no batteries, light from panel would roughly equal the light on the solar panel.

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    Maverick-au on 26/11/2015 - 19:23

    ie: no batteries, light from panel would roughly equal the light on the solar panel.

    No, you will not get 100% efficiency or anywhere near it.

    The other issue is that the light will not just fade out like the sun when it goes behind a cloud, it will either be on or off so it will often be blinking. You would be better off just running it via an ac adapter and a timer or alternatively use a solar panel, regulator and battery along with a timer.

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      gizmomelb on 26/11/2015 - 23:03

      that is the whole point, a solar skylight. it's not meant to be 24/7 lighting. could get a sparky to wire it in to the mains and have a three state switch.. off / on and solar.

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    Russ on 26/11/2015 - 20:17

    If you want a skylight using a solar panel and LED lighting, you will find it far simpler to use a 12V system. 12V panels and 12V lighting are readily available, but I don't think you'll find anything ready-made that looks like this lighting panel.

    Also, you probably don't need as large a solar panel as you think. A 20W solar panel is 64x30 cm (Jaycar ZM9094), and 20W of LED lighting would function adequately in most residential situations - 20W of LED lighting is roughly equivalent to 100W of incandescent lighting.

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      Maverick-au on 27/11/2015 - 04:12

      If you want a skylight using a solar panel and LED lighting, you will find it far simpler to use a 12V system. 12V panels and 12V lighting are readily available, but I don't think you'll find anything ready-made that looks like this lighting panel.

      This comes with a AC to DC transformer, the panel is DC. 12V panels are inefficient and generally poorly made, use a regulator instead with a higher voltage panel(s).

      Also, you probably don't need as large a solar panel as you think. A 20W solar panel is 64x30 cm (Jaycar ZM9094), and 20W of LED lighting would function adequately in most residential situations - 20W of LED lighting is roughly equivalent to 100W of incandescent lighting.

      A 20W solar panel will rarely if ever put out 20W so you won't be able to drive a 20W led light from it.

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        Russ on 28/11/2015 - 15:35

        use a regulator instead with a higher voltage panel(s)

        All of the 12V lighting that I have used is a 9V chain of LEDs and a constant-current circuit. No need for a regulator, the constant-current circuit takes care of that.

        A 20W solar panel will rarely if ever put out 20W so you won't be able to drive a 20W led light from it.

        Because of the constant-current circuit, the "20W" light will draw 1.67A at 12V. That's 20W total consumption, not 20W going to the LEDs, the constant-current circuit consumes some of the power. The light will continue to draw 1.67A down to about 10V, consuming only 16.7W from the solar panel - so it will be at full brightness from about 10am to 2pm. Outside those times the light will still be on, but will get dimmer - just like a real skylight!

        Below full illumination, solar panels have very little voltage drop, but the current available drops, as shown in the graph on this page:
        http://blog.atmel.com/2013/10/24/current-sensing-for-smart-m…

        So the LED lighting will receive some current until quite late in the afternoon.

        12V panels are inefficient and generally poorly made

        Then you're buying them from the wrong suppliers. Also, who cares about the efficiency - if it says it is a 20W panel and doesn't supply 20W, return it.

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  poboy on 26/11/2015 - 18:59

  FYI - 3150 lumens for 40W and 50,000 hour life. Looks good.

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  RubenM on 26/11/2015 - 18:59

  +1

  How long is the warranty and what do you constitute to be a failure? A single LED?

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    Associated[Deactivated] @ ECO Light on 27/11/2015 - 19:07

    +1

    Warranty is 5 years domestic and 3 years commercial, a failure can be the loss of 1 LED.