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Old 12-12-2017, 11:27 PM
Scratch Scratch is offline
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Join Date: Feb 2007
Location: Hudson WI
Posts: 255

So a few days ago I ordered 2 of these LED tubes that are 48" long, and 2640 lumens for 7.99 each. (I only bought two bulbs because I only have one fixture that I can use these on) These LED tubes bypass the ballast and use my existing tombstones which are non-shunted already. I completely forgot about them, when they showed up today!

As soon as I opened them up, I just had to test them out by running a couple wires directly into the AC wall outlet. As expected, they work perfectly by just using two alligator clips on the end of a junk lamp cord... no tombstones, no fixtures, just laying on my bench, bright as heck, and cool to the touch.

Which got me to thinking...

If I could figure out a way to hang this bulb on the ceiling, like with tie wire or something, I could run a single tombstone to the power end of the bulb and this would work fine! I found tombstones for less than $.60 each here:

So for $8.58, I could have a 4' LED "fixture" that puts out 2640 lumens. I could even have an 8' "inline fixture" (keeping the powered tombstones in the middle) for $17.17 That would put out 5280 lumens! That would be the super easy, super cheap, ghetto way of lighting a room with LED's!

Of course I don't think the electrical inspector would like that at all...

But then I thought hey... for about 7 years, I've had all these extra steel single gang electrical boxes that my old boss gave me, (about 80 of them) and I have a CNC plasma cutting table. I could use two boxes for each bulb, and using my CNC table, easily make a box cover for them, with a perfect sized rectangle hole for the tombstone in each one. Then screw it to the ceiling and voila... a clean looking, inexpensive, electrically safe way to mount the bulbs. And it would only add another $.60 for the second tombstone.

The only problem I see is that I'd have to make sure I get them the exact correct distance apart but I do know how to use a tape measure so that shouldn't be that hard...

If I didn't want to do the two bulb thing, I could do the same thing, but instead, use this 8' bulb that puts out 4200 lumens:

Then buy these tombstones priced at $3.72 per bulb:

And I could have an 8' fixture with 4200 lumens for $22.71! Of course, these are double ended power bulbs so I'd have more wire to run, and the double 4' bulbs would be cheaper and more lumens anyways so the first option makes more sense.

Anybody see any problems with this?
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Old 12-12-2017, 11:32 PM
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Scotts Scotts is offline
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Join Date: Dec 2004
Location: Wichita Kansas
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Metamerism, a little info about color and perception lights and such.

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Old 12-17-2017, 07:58 AM
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toprecycler toprecycler is offline
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Join Date: Jan 2009
Location: Petoskey, Michigan
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Originally Posted by Scotts View Post
Metamerism, a little info about color and perception lights and such.


Thanks Scott. Interesting read. I guess my eyes are off a little in the color cones. I sometimes have difficulty with reds and greens. I always think I am going to fail my drivers exam when they give me those color circle tests and tell me what number is in there, and I always tell them “what number?”

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