Lights

Lights

I got one of each of the two lights I am considering for the shop/garage. The smaller 10K Lumen draws 92 watts, and measures 6200 Lux@1m direct (which is about right for 10K Lumen and an 83 degree profile). The larger 18K Lumen draws 162 watts and measures 11000 Lux@1m direct. A standard 600 Lumen CAN Light measures around 450-500 Lux@1m direct, so this single fixture is more than 20 times as bright as a single can light.

Both appear easy to install, and good physical quality. It would be possible to replace the power supply, which is certainly the weak link. I couldn’t detect any audible sound from either (hum or whine).

The both cost about the same, $96-$99 each, so time to order 30 of them.

Drywall

Drywall

The drywall texturing is done, and some of the walls have been primed. The house is very very white right now! The downstairs should get primed tomorrow, then comes color!

Lights

Lights

I need to pick the light fixtures for the lower shop and lower garage. Lower garage has 12 fixtures, lower shop has 15 fixtures.

I’m thinking of doing the 18″ 10k Lumen fixtures in the garage (1100 sq ft), and the 24″ 18k Lumen fixtures in the shop ( 1400 sq ft ).

That maps out to 109 lumens/sq ft in the garage (total of 120,000 lumens), and 193 lumens/sq ft in the shop (total of 270,000 lumens). Those are high numbers.

A second minor issue is the shop lights are all on one 15amp circuit, so I need to switch that circuit to run at 240Vs if I want all 15 of those lights to work. Those guys are 177W real power each.

Cameras

Cameras

Let’s talk about cameras. POE Cameras. I need to get 36 of them, so I bought a few different ones to test.. nothing crazy extensive, but enough for me to compare across a few different costs. I have a bunch of Hikvision ones (I used them in the current house), a Dahau, a few ReoLink ones (new), and a few Ubiquity ones (including a G3 and a G4 Pro).

The cost spread is significant. The Reolink $40, the Hikvision about $100, the Dahau about $150, the G3 about $140, and the G4 Pro about $450. Consider at the cheap end 36 Reolinks would cost $1140, while 36 G4 Pros would cost $16,000.

There is no question that the G4 Pro has the best video quality.. it is just stellar, but I was surprised that all of the other ones were very very similar to each other. The Reolink seemed a tad worse than the G3, but I doubt I could pick one from the other in a lineup and be confident.

People often mention the risk in the Chinese cameras (Reolink, Hikvision, etc) of them being compromised or being a security risk, but of course only the most unqualified network engineer would ever have these cameras in a subnet that has outside routable access. These will be in a dedicated physical network.

It is possible the Reolink or Hikvision will fail sooner.. of course interestingly enough I have 12 Hikvision cameras here now that have been running for 4+ years, as well as I had 4 of the Ubiquity first gen cameras that have all died. Consider for the price difference I could buy 7 spares for every camera in the house. That is a lot of spares.

(Note I will probably use BlueIris to record everything, although I have been testing Xeoma and it has worked well so far).

Any comments, suggestions, price comparisons?

Learning

Learning

I have a learning style question. A friend of mine (Paul) asked a similar question a few weeks ago about learning new concepts from video material.

Consider the video linked below. It is a classroom video from a Cornell class on non-linear dynamics. This particular video isn’t very technical, and the math used is light high school calculus level. The presentation is a standard college lecture style. The concepts in this video would probably only span 4-5 pages in a written text book.

The question: How is this kind of presentation as a learning tool for you? Could you follow along the with the concepts? Do you pause and think, rewind and play again, take notes? Scream out answers to the questions?

This video is 1h 13 mins long, so I suspect most of you are not going to watch the entire thing. I watched all of these at 1.5x speed since the content rate isn’t super high.

My opinion – and the reason for the question – I like this style, and I can really absorb concepts delivered this way. Am I in the minority or majority?

Also, I must have stacked slidable whiteboards in the new house. Must.

Terms

Terms

I have a lot of terminations to do at the new house. I would guess over 1000. On the panel side I’m going to use keystones in place of the standard panels.

One advantage is I can use metal shielded ones for the Cat6A shielded wire, and the regular Cat6 ones for the Cat6/Cat6A unshielded. It also makes the cable management a bit easier as I can move things around.