She'll be ready any day now

It really depends on the application. If you are making your own lights, I still recommend the 351 series. The LH351 series are more expensive but they have a much higher output capacity. For individuals, these are better because you can make a fairly powerful light with a handful of them. The LM301 series has been used in grow lights for years, and that is because their capacity is much lower and they are relatively inexpensive. From a circuit design perspective, this is a better option for manufacturers because it simplifies the on-board power management. Since those configurations are highly parallelized and use way more LEDs, it also allows for several to burn out without shutting the whole board down. It would take you forever to build a decent board with them by hand, though. In short: LM301 - better for manufacturers. LH351 - better for hobbyists. Edit: This only applies if you are making your own lights. If you want to buy a premade solution, the 301-based boards will probably last longer and be slightly more efficient due to better thermal management.

Always nice to see someone enjoying this content. You are right that things got busy and I haven't taken the time to start prioritizing this again. I do plan on it in the future, but can't say when at this point. Definitely still building lots of stuff, time permitting, although I never could solve the smell completely so I mostly grow tomatoes & stuff now 🥲

The LM301B are good lights, but you need a lot more of them. These run on less current and are the type usually found on Spider Farmer / Mars Hydro lights. If you are going to make your own lights, I definitely recommend going with a 3535 footprint, like the Samsung LH351B. They are more expensive, but put out more much more power and will be a lot simpler to assemble.

@@autumnmaticcreations62 Thanks, i've had a look and the LH351B are clearly a MUCH better option. I did have another question in regards to adding different coloured lights (all in series) using the same power supply. Say for example we use 3 different colour LED's and all three have a different Forward Voltage and max current. Is it safe to use one power supply to power the whole thing? Assuming of course the constant current of the power supply does not exceed the max current of any of the three LED's, and the total voltage of the whole series is within the acceptable range of the power supply.

@@Sasquatch10 Yep. That is totally fine. The power supply is agnostic as to what kinds of lights it is driving. You run into issues when you try to run series strings of colored LEDs in parallel from the same driver and the colors don't match. Since the voltage/current ratio is different for each string in this case, but the voltage is forced to be the same, you can run into an issue where one of the strings takes on almost all of the current. Not a good outcome if, say, you decide to run six strings of 1A max LEDs in parallel with a 3A supply.

Thanks! Unless your lights are going to be in the splash zone, I would not worry about water too much. If you want to err on the side of caution, you could look into silicone sealing spray - just make sure it can handle high temperatures. Anything rated for outdoor use should be fine.

If i'm not wrong i believe the carbon filter was being used as an exhaust rather than an intake.

Wattage is just a measure of power. The way we usually calculate it is with VoltagexCurrent. It is no different as you change light types. With most lights, we apply a voltage to them and they pull as much current as they can for that voltage. LEDs actually work the same way, but they are much more sensitive and can behave strangely, burn out, or explode as they heat up if we drive them with a constant voltage. For that reason, we usually drive LEDs with a constant current supply rather than a constant voltage supply.