I'm finding some strange/possibly dangerous information on LED tube lights...
Type 1) some suggest that one end of the bulb should only receive N on either pin, and the opposite end of the tube should get L on either pin... - example A: www.earthled.com/EarthLED-DirectLED-FL-Install-Guide.pdf.pdf - example B: »www.sr-leds.com/2010/1027/LED-tu···ion.html
Type 2) other's suggest that on one end of the bulb apply L and N to each pin... - example C: www.earthled.com/DirectLED-FL-UserGuide.pdf
...seems to me this should be a standard... If it varies by bulb type/mfg. now I have to mark each fixture for the type of bulb it will accept
Also seems to me that L on one end and N on the other end (one pin only) would work universally?
I haven't actually received the bulbs yet to determine in the 2 pins on one end are internally shorted, such that wiring like "Type 2" would prove "dangerous" It seems that "Type 1" is correct or "most compatible" ?
Looks like some cheap Chinese brand. The big thing about these is mark sure you mark in huge letters. Phillips includes these small letters and we just had a client that swapped out to the LED Tubes from Phillips and the stickers are on all the lights. The bulbs are clearly different than a regular fluorescent yet the guy still took out our bulb, replaced it with a T12 and threw out the LED bulb that was only 3 months old. $66.00 down the drain. -- Edrick Smith Independent Film & Broadcast Producer »edricksmith.com
reply to imanon I have no idea why a single-ended configuration is even available. It's just plain dangerous to have both sides of the supply available on the tombstone. A supplier mistakenly ordered 12 of the single-ended tubes for a job. I ended up using them in my shop and reordering the double ended version for my client. The mere thought of 277V available on a cheap tombstone and what would happen if the wrong lamp were installed is scary.
Arc flash propelled glass shrapnel is what you'd get with the wrong bulb.
Well, maybe not, thinking about it more, since the heaters in regular bulbs are made for the voltage anyways. An LED one with the prongs shorted together should just trip the circuit protection or catch fire, depending on how well shorted together they are =p