expired All Mirabella LED Globes 50% off @ Coles (Prices from $3.25)

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All Mirabella LED Globes 50% off @ Coles (Prices from $3.25). Enjoy :)

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  •  

    This LED or Phillips's LED is better?

  • +8 votes

    Thanks Lightarse :)

  •  

    Just fyi … use your phone to test LED comfort ie set your mobile to camera and hold it up to the led bulb … if you get the venetian blind effect DON'T BUY as this really taxes the eyes !!! Don't just buy on brand name as I have found that so-called reputable brands are the worst for eye strain. I replaced my whole house incl. Philips, Mirabella Osram with a lesser known Bunnings offering which didn't cause eye strain. Flickering light can trigger some serious ailments such as headaches, visual impairment, or in extreme cases, epileptic seizures.

  •  

    ALL smartphone cameras can capture images at a discrete frequency, so they’re reliable tools that clearly register when there is no light.

    One more way to use your smartphone to test for flicker is to download a flicker test app. VISO Flicker Tester uses your phone’s camera to measure a light’s flicker index, flicker percentage, and frequency values to give you a bigger picture of your lighting quality.

    •  

      Yes cameras work at a set frequency (which isn't fixed as you can change the frame rate) but that has nothing to do with testing the quality of lighting.

      What you see also depends on how well the camera synchronises with the light, you could possibly start and stop the camera multiple times and get different results each time.

      By your reasoning cameras must capture things better so plane propellers must actually look like this https://petapixel.com/assets/uploads/2014/10/3192314056_e0df...

      Anything that works from AC power will "flicker" even old light globes

    •  

      ALL smartphone cameras can capture images at a discrete frequency, so they’re reliable tools that clearly register when there is no light.

      Nah. The banding that you see in your camera app is a result of the interaction between our 50Hz mains frequency and the camera's shutter speed. If your phone camera isn't 50Hz-aware it will use increments of 1/60s rather than 1/50s. Some camera apps have an 'anti banding' feature - this simply lets you select the mains frequency where you are. Selecting shutter speeds in 1/50 increments in a 50Hz country will reduce or eliminate banding.

      One more way to use your smartphone to test for flicker is to download a flicker test app.

      That would be the only reliable way with a phone. An app would be able to control the camera's shutter speed directly so it knows what to expect, so it can do the appropriate calculations.

  •  

    I used a samsiung note 5, LG g6, iphone 6s , motorola G5 and they all gave the same positive flicker test on the low quality, flicker bulbs !!

    • +3 votes

      That’s exactly what Soraa does with its lighting, effectively rendering them flicker-free. To learn more about Soraa’s newly released flicker-free lights for the home, visit www.soraahome.com.

      A marketing article for a company that makes globes isn't proof of much.

  • +6 votes

    The Mirabellas appear to use older tech LEDs. 9.5w delivers 800 lumen. The current generation of Philips/OSRAM that are widely available (Bunnings, etc) give you 100 lumen per watt, so would consume only 8w.

    Over 15,000 hours the Mirabella would use 15000 * 9.5 / 1000 = 142.5kWh, while more efficient LEDs would use 15000 * 8 / 1000 = 120kWh.

    At 30c/kWh the cheap light bulb uses $42.75 of power while more expensive Philips/OSRAM use $36. If a more expensive but more efficient light bulb is within $6 of the Mirabella's price, buy the more expensive product.

    •  

      Great analysis

    • +1 vote

      At 30c/kWh

      If you're paying 30c/kWh you should hand in your OzBargain badge. ;)

    •  

      Am I the only one that doesn’t expect a $5 bulb to last more than 5 years (15,000 hours for me)?

      • +1 vote

        In theory the Light Emitting Diode can last a really long time, but in practice poor heatsinking and the failure of electronic components (few globes seem to run direct from 240V AC) will result in the globe failing long before this theoretical lifetime.

  •  

    Thanks for letting us know.

  •  

    Wouldn't buy this brand myself, got a few only last few days.

  •  

    I bought one of the Cool White ones but the colour temp for Cool White is only 4000K, so its not very white at all.
    Whereas most other Cool White are around the 6000K plus.

  • +1 vote

    Mirabella is crap don't waste your money.