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Light

Discussion in 'Electrics UK' started by wull67, 20 Feb 2021.

  1. wull67

    wull67

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    Anyone know about the light attached? It’s been lying in the loft for years and I decided to fit it in the shed today, the light will stay on for about 5 mins then go out, by the model numbers can you say if it’s a sensor light and should be acting as above or should it stay on when powered? Thanks
     

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  3. Harry Bloomfield

    Harry Bloomfield

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    From what little I can work out, it is just a normal 2D (double D) florescent fitting, 28w and should stay on whilst ever it has power.

    Usual fault is failing to light, just glowing at the tube ends, or flickering on and off. Might be worth swapping the starter, to see if it stays on, but you will need the correct starter for it.

    Note: - 2D's and florescent tubes are not considered long lasting or particularly efficient nowadays - LED is much better in most respects. If it is for a rarely used loft light, I don't suppose it matters.
     
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  4. wull67

    wull67

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    Hi, when I switch it on it lights brightly and fully then after 5 mins it goes completely out, no glowing or flickering

     
  5. sparkwright

    sparkwright

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    Send a picture of inside the light if you can - you never know, it may help.
     
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  6. wull67

    wull67

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    Will do, need to be tomorrow though, thanks
     
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  8. 333rocky333

    333rocky333

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    It does not have a starter the HF denotes its a High Frequency 28 watt standard2D fitting with a Cool White 28W lamp fitted (4 pin)
    TC-DD Tubular Compact Double D Lamp
    To stay on for 5 minutes is odd, usually if the ballasts faulty it only lasts seconds, if any.
     
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  9. RF Lighting

    RF Lighting

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    I’ve never known what TC stood for!

    @wull67 does the light come back on for another 5 mins if you flick the switch off and on again?
     
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  10. 333rocky333

    333rocky333

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    Was quite important back in the day as some ballasts for (TC) compact lamps are not the same as ballasts for (TL) straight tubes of the same wattage

    Others in the range,
    I think these originated prior to HF ballasts in the days when 4 pin were mainly used in Emergency fittings

    TC-S single loop 2 pin
    TC-D double loop 2 pin
    TC-T triple loop 2 pin

    TC-SE single loop Emergency 4 pin
    TC-DE double loop Emergency 4 pin
    TC-TE triple loop Emergency 4 pin

    TL Tubular Linear (Standard straight tube lamp)
     
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  11. fluorescence

    fluorescence

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    The lamp is bad or you've fitted the wrong wattage of lamp most likely. The HF ballast will be shutting the lamp down thinking it's faulty as the operating parameters are wrong. You need a 4 pin 28w lamp.

    I highly recommend buying a new old stock 2D lamp as modern ones are all junk and won't last long. Something like this should last many years: https://www.ebay.co.uk/itm/2D-28-W-...573211?hash=item1cfec7865b:g:Y0IAAOSw6bNgBcLz
     
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