→ Autonomous lighting in the garage.
I promised to tell you about autonomous garage lighting. The boy said! The boy did! =) Want to know more?! You know what to do!
Initially, 3 fluorescent lamps were installed in the garage, they shone, I must say, very badly. But the main thing is not this, but the fact that in our cooperative electricity is conditionally free, and with the onset of cold weather, everyone begins to warm up mercilessly and constantly knocks out traffic jams. In order to turn them back on, you need to reach the entrance and turn the machine back on in the shield. It can knock out traffic jams several times an hour and up to several dozen times a day ... Accordingly, it gets boring to walk and the people sit in the garages, waiting for the first one to lose their nerves and he will go and turn on the light. The wait can last up to half an hour, well, or go stick it yourself. =) We are a little bit tired of such layouts, it’s better to walk or sit without light. And we decided to arrange autonomy, fortunately, at my communication center, according to the regulations, it was time to change the battery in the UPS (Uninterruptible Power Supply, if anyone is not in the know) and 8 pieces of batteries of 17AH each broke off in our garage ... 
Immediately the question arose of how and how to recharge them, and it is desirable to do this automatically. The simplest option that came to mind was manual recharging from an ordinary charger, but this option did not suit, due to its non-automatic nature. And then, again for free, we turned up a decommissioned, but quite working UPS. However, there were doubts about its ability to charge such a volume of batteries, because in stock it only has an 8Ah battery. I even consulted on this issue with dudes who work in an office specializing in UPS repair. To which I was given the answer: “It won’t take off!” However, my inquisitive mind refused to believe it and it was decided to test it all in practice. In practice, it turned out that it would take off very much. However, if the voltage on the battery drops below a certain level, then the UPS thinks that it has enough batteries and refuses to work, yells and generally behaves like a pig. However, this problem is not a problem at all, because our shutdowns are frequent, but short, and the battery assembly simply does not have time to sag, at least not once in almost a year of operation, only when we tested the system. Plus, from this assembly, my stereo system works and the screwdriver is charging, and this is the main consumer of electricity in the process of moto service. A sharpener, drill, grinder, etc. are also used, but much less frequently than light and a screwdriver.
We figured out the power supply, it remains the case for the light source. Here, diode technologies are ahead of the rest, we opted for diode strips from Samsung, we bought 8 of them, 4 for garage lighting and two more directly above the workbench. 
This is what the system looks like during installation and testing. The total power of the diode bars, about 200 watts. They give a very even and soft light, in addition to autonomy, we also slightly increased the luminous flux in the garage, on the workbench it generally became like on an operating table. 
But with diode strips, everything turned out to be not as simple as it seems at first glance. The main problem arose in how to attach them to the ceiling. It is not advisable to drill the plate itself, because paths are applied to it, along which the power supply of the diodes goes. In general, they are installed like this: They take a specialized profile, a bar with diodes is pushed into it from the end and a plastic diffuser is pushed in from above, but the main snag is that the diode bars cost 300 rubles each. apiece, and for the profile we were charged something around 800r. per metre. =) We have never been satisfied with such layouts and we bought aluminum in a hardware store. channel 10x15 mm at a price of 45 rubles. for a two meter stick. This channel was fixed to the ceiling with self-tapping screws, and the diode strips themselves were attached to the channel with cable ties, through holes previously drilled in the channel. Thus, there will be no problems with replacing the slats in the future (if they burn out suddenly). Their life span is declared to be 80-120 thousand hours of continuous operation. The plans are to add a couple of planks in front of the shelving and a couple of directional diode lamps above the workbench with a grindstone and vise. And then when you stand with your back in front of them, you close the light and the shadow falls.
