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  1. lighting grounded conductor strange behavior

    General Electrical Discussion
    I was troubleshooting a light fixture today and found some splices that were not completely satisfactory. These were 4' strip, 2 bulb, T8 light fixtures. The switch for the fixture was turned off and all was good until I disconnected the neutrals at the light fixture we were working on. When the...
  2. Dimmable T12 Ballasts

    Commercial Electrical Forum
    I am looking for Dimmable Ballasts for T12, 40 watt, 4' Optima 32 Fluorescent Lamps! Spoke with Philips/Advance and Fulham with no success. I am hoping one of you fine electricians out there will be able to steer me in a direction where I might find some of these elusive items. I am looking for...
  3. Multiple fluorescent ballasts failing

    General Electrical Discussion
    Hey all, I've been having some issues lately with a building where I installed some T8 fluorescent light fixtures. I've gotten called back twice now with ballasts failing, (six total after only 4 months since install) and I'm trying to figure out what might be causing it. Here are the details...
  4. Lithonia T8 and LED 1x4 wraparound. side-by-side performace comparison

    Lighting Design
    This thread compares the Lithonia 1x4 wrap-around fixtures in the LED version LBL4 LP840 and the T8 version LB232 MV. They're nearly the same and are both current production luminaires. 1x4 wrap around with a curved K12 diffuser 10" width by 48" length and 3" height surface mount. The...
  5. National Lighting Accounts Pricing

    Commercial Electrical Forum
    All, I'm new to this forum so let me apologize in advance if I put this in the wrong section. I wanted to get an idea for the national account pricing for linear fluorescent lights from companies such as GE, Philips, Osram, etc. I'm trying to figure out whether or not this is worth pursuing...
  6. Fluorescent Lights Randomly Tripping

    General Electrical Discussion
    We have installed 11 rows of 8ft T8 flourescent fixtures with four 4ft lamps in each fixture on a job. Each row has 12 fixtures on it drawing approximately 11.5 amps per row. Each row is on a dedicated 20 amp circuit. The lights are controlled by a GE 12 pole lighting contactor. The same row...
  7. What type of lamp and fixture is this?

    Lighting Design
    Hi! I was wondering what type of fixture this is, and how the light is controlled? https://www.dropbox.com/s/r6xxcc98yotuqw6/IMG_5648.JPG I know it's a linear pendant fixture with T8 fluorescent lamps. At first I thought it had cross baffles, but seems like it is actually exposed. What do...
  8. Welcome LEDs, and welcome back 1960s retro flickering Disappointing lamp quality

    Lighting Design
    Consumer LED products have come a long way. Last time I was signed on this forum, the latest was the Philips L-Prize which cost like $50. At that price, it was limited to gadget enthusiasts. LED "light bulbs" have come and gone, and often ending up in clearance section within a few months due...
  9. LED sales people.. what are the reasons you use to push them?

    Lighting Design
    As to why you feel customers should get LEDs for general service lighting applications for new install or retrofit instead of the newest discharge technology available.
  10. Philips EnduraLED 48"T8 apparently 32% less efficient than mercury gas technology

    Lighting Design
    Philips EnduraLED 48"T8 apparently 32% less efficient than mercury gas technology Available in 11W 825lm and 22W 1650lm.. 40,000 hrs/85% maintenance(over how many hrs, I don't know) Can't be used with shunted instant-start sockets. It's wired like a glow-starter type fluorescent lamp with a...
  11. LED light vs fluorescent

    Lighting Design
    I have an LED T8 tube, 1.2m, on 240VAC it draws about 80mA and it has 18W. I do have compared it with a 1.2m fluorescent T8 tube, 36W plus ballast which has on 240 VAC 400mA. The current I have measured with an AC multimeter. Means the LED light saves 5 times the power. If I compare the 18W to...
  12. What dimmer for 2-wire fluorescent dimming ballast?

    Lighting Design
    What are some dimmers that work well realistically with ballasts like Advance Mark-X and Lutron TuWire? They're both two-wire phase control dimmable ballasts. Of course, Lutron sells *expensive* $60 purpose-made dimmers, but could a standard magnetic load rated, fan or even a standard dimmer...
  13. Pictures 5000K 85, 90 & 98 CRI fluorescent+ 6500K LED

    Lighting Design
    I decided to take a few since what I can find is just color chip comparison. CRI is calculated based on how it renders eight standard color chips, hence "Ra8". Its easier to compare on spec sheets, but they don't always tell you the true story. Different color temperatures look different...
  14. Propose an LED based general lighting

    Lighting Design
    There are some who swear that LEDs are more efficient and superior to fluorescent for general lighting, but I firmly believe that LEDs just do not even come close to being competitive with fluorescent system for general lighting. I think LEDs have an edge in single digit wattage accent...
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