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Forum: General Light Discussion

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  1. Moved: 60 cm German searchlights WW2 - Carbon arc

    Started by flux82, 06-17-2018 03:31 PM
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  2. Output of a camera flash in lumens?

    Started by cchurchi, 07-27-2007 10:36 AM
    • Replies: 23
    • Views: 56,274
    05-13-2018, 08:38 PM Go to last post
  3. SPD curves for standard light sources

    Started by tedfine, 04-16-2018 08:32 AM
    • Replies: 8
    • Views: 957
    05-02-2018, 07:50 PM Go to last post
  4. Phosphor conversion of photons in LEDs & photon recycling efficiency

    Started by Genzod, 02-23-2018 09:46 PM
    3 Pages
    1 2 3
    • Replies: 64
    • Views: 6,603
    05-01-2018, 12:53 PM Go to last post
  5. How many lumens is a street lamp?

    Started by StainlessSteel, 04-19-2005 11:33 PM
    • Replies: 19
    • Views: 32,366
    04-30-2018, 05:18 PM Go to last post
    • Replies: 6
    • Views: 1,816
    04-29-2018, 07:41 AM Go to last post
  6. Best single cell 18650

    Started by Shortydog, 04-02-2018 12:49 PM
    • Replies: 1
    • Views: 538
    04-02-2018, 07:01 PM Go to last post
  7. We have been doing our wake up lighting all wrong.

    Started by degarb, 02-18-2018 08:22 AM
    2 Pages
    1 2
    • Replies: 34
    • Views: 3,536
    03-25-2018, 12:54 PM Go to last post
  8. ceiling down lights, 97 CRI ?

    Started by Strintguy, 11-26-2017 03:03 PM
    • Replies: 6
    • Views: 2,039
    03-21-2018, 11:58 PM Go to last post
  9. Thumbs up Replacement driver - Advice please!

    Started by echo252, 03-17-2018 01:15 AM
    • Replies: 1
    • Views: 714
    03-18-2018, 01:46 PM Go to last post
    • Replies: 1
    • Views: 2,532
    02-28-2018, 02:14 AM Go to last post
  10. Phillips HUE to emulate GE Reveal

    Started by benhar, 02-04-2018 10:17 AM
    • Replies: 6
    • Views: 1,261
    02-28-2018, 01:27 AM Go to last post
  11. Flexible USB Notebook LED Lights

    Started by JAS, 02-11-2018 11:46 AM
    • Replies: 0
    • Views: 703
    02-11-2018, 11:46 AM Go to last post
  12. Replacement/equivalent to original Cree TW A19?

    Started by wws944, 02-01-2018 05:18 PM
    • Replies: 4
    • Views: 1,176
    02-05-2018, 08:05 AM Go to last post
    • Replies: 0
    • Views: 885
    01-23-2018, 04:03 AM Go to last post
  13. Blinking LED stops dsylexia

    Started by degarb, 10-19-2017 05:25 AM
    • Replies: 5
    • Views: 1,792
    01-19-2018, 02:10 PM Go to last post
  14. Do you still use incandescent light bulbs?

    Started by LCSZ, 06-07-2015 04:34 AM
    3 Pages
    1 2 3
    • Replies: 79
    • Views: 27,469
    01-15-2018, 06:44 PM Go to last post
  15. Minimum lux at target required to recognize a defined target?

    Started by Genzod, 06-09-2017 06:32 PM
    4 Pages
    1 2 3 4
    • Replies: 112
    • Views: 22,133
    01-15-2018, 11:06 AM Go to last post
  16. Need help making a lamp

    Started by Rodville, 01-12-2018 07:22 PM
    • Replies: 0
    • Views: 824
    01-12-2018, 07:22 PM Go to last post
  17. Power cables for street lighting installations

    Started by Alex-1kV, 12-15-2017 11:22 AM
    • Replies: 1
    • Views: 1,102
    12-31-2017, 04:31 AM Go to last post
  18. Vitamin D Lights?

    Started by Bright_Light, 09-25-2017 08:26 PM
    • Replies: 27
    • Views: 4,184
    12-15-2017, 08:38 AM Go to last post
  19. Red Light Therapy

    Started by Stephen7372, 11-04-2017 05:07 AM
    • Replies: 4
    • Views: 1,593
    12-13-2017, 07:24 PM Go to last post
  20. LGP laser etched dots or v grooves

    Started by anmb, 11-29-2017 05:32 AM
    • Replies: 8
    • Views: 1,789
    12-03-2017, 04:50 AM Go to last post
  21. Cylindrical beam spotlight

    Started by Datman, 11-15-2017 05:48 AM
    • Replies: 0
    • Views: 1,450
    11-15-2017, 05:48 AM Go to last post
  22. Low Light For Taking Notes

    Started by ShadRig, 08-01-2017 03:44 PM
    • Replies: 14
    • Views: 4,406
    10-13-2017, 02:19 PM Go to last post
  23. Getting accurate colours with RGB numeric triplets

    Started by Vagulus, 10-12-2017 07:33 PM
    • Replies: 0
    • Views: 1,498
    10-12-2017, 07:33 PM Go to last post
  24. is 2500 lumens per watt possible

    Started by raggie33, 09-19-2017 07:11 PM
    • Replies: 9
    • Views: 2,839
    09-21-2017, 11:59 PM Go to last post
  25. Lights for disaster victims

    Started by firefly99, 08-12-2017 12:26 AM
    • Replies: 20
    • Views: 5,231
    09-09-2017, 10:29 PM Go to last post
    • Replies: 0
    • Views: 1,634
    08-26-2017, 01:09 AM Go to last post
  26. 240v light fitting to 12v power supply

    Started by Gwilliamb, 08-15-2017 08:16 AM
    • Replies: 2
    • Views: 1,830
    08-16-2017, 06:52 AM Go to last post
  27. Review: Zanflare S2 LED Strip

    Started by stephenk, 08-14-2017 04:35 AM
    • Replies: 0
    • Views: 1,807
    08-14-2017, 04:35 AM Go to last post
    • Replies: 2
    • Views: 2,777
    07-20-2017, 04:37 AM Go to last post
  28. What's the best LED Light Strip lamp below $50

    Started by JoyceA, 07-15-2016 12:02 AM
    • Replies: 1
    • Views: 3,848
    07-14-2017, 04:15 AM Go to last post

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