EEVblog #364 - LED Ceiling Panel Lighting Install

Installing Doug's 60W diffused ceiling LED light panels in the lab.
And a look inside a typical office ceiling crawl space.
Dave also demonstrates depth of field for video camera shots.

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[mooseteets]

the opportunity for office pranks is enormous ! rooting around in the roofspace would get me into so much trouble.

[jjlwis]

OK now that you added the 2nd panel it looks PERFECT!

[EEVblog]

Got one, they are a PITA for general use.

[WhitentonMike]

@EEVblog, The new lighting looks great Dave! If you wanted a bit more reflection in the front or your left side, you could install a couple of mirrors on the walls in the corner and some black wall covering on the wall in front of you to the right side, to get less reflection where you don't want it so much.

[ReeseRiverson]

I find it amazing to see the difference in electrical wiring between there in Australia and here in the US. Everything in our office is ran in conduit for all the lighting and outlets. I learned something new here! :D

[Boffin]

Is that a power bar in the ceiling (3:46)?  Definite no-no here in Canada

[MrGab]

I've found these vids on your LED lighting quite interesting, Alot of your vids are a bit over my head though because i'm only a beginner at electronics, but I find stuff like this quite interesting.

Cheers

[EEVblog]

Unfortunately to bring them lower means PWM flicker. Would have to hack somehow to get rid of that.

[aptsys]

In the UK they call those ceilings suspended ceilings. Surprising how the wiring up there is all loose to move around. We'd normally have Plug-in Ceiling Roses that fit in BESA boxes for lighting.

[PinBallReviewerRepairs]

The new lighting looks good like others have mentioned I noticed the flickering going on when you have your camera pointed at the wall side.

But the face cam view looks fine.

[TheSentientCloud]

I watch his vids 5% for the content, and 95% for his EPIC accent.

[TilmanBaumann]

I'm surprised that you did not go for at least one up frontal light. Should remove shadows in your face and so.
Love the more closed aperture. Really makes it worthwhile.

[quesocat]

FSM shirt? You gained even more of my respect. :)

[TheCrazyStudent]

Installing those LEDs in the ceiling was really a bright idea. (Couldn't resist that one.) :)
I think the picture looked somewhat overexposed during the first test with the LEDs turned on, but during the second test when you put the camera back into auto exposure, then it just looked totally awesome. What's the make and model of your camera?

[TheHuesSciTech]

If you think it's too bright, then telling the camera to use a lower exposure (exposure compensation) would be a better solution that avoids flicker.

[rainbowsalads]

its useful to have a light on a boom stand too so you can move around to different areas.

[aptsys]

The higher frequency can be folded back into low frequency that the camera would pick up. The camera should be designed to reject 50 and 60Hz and their harmonics, so ideally you'd pick a frequency that's a multiple of that.

[CampKohler]

In U.S., comm wiring (etc.) is not allowed to drape across the tiles; they must be supported from above so that when firefighters pull down a ceiling during a fire they don't get a facefull of cables. Notice the yellow telco wires are held up with cableties and stickpads. Do you think they would hold up during a fire? It wouldn't be as pretty, but it would be better to tie the cables to the grid hanger wires (which might not be legal either).

[CampKohler]

Does the return air to the air handlers travel by ductwork or just use the space above the ceiling? Sometimes they do the latter to save money, but then all the wiring above has to be "plenum rated" to prevent fire from following the cables like a explosives fuse.

[Slugsie]

Looks good, but I think you need to get one of those photography reflectors and place it below and behind the camera. They're only a few bucks on ebay and would help remove the remaining shadows in your face.