You asked whether there is real demand behind any of this. Here it is: Google's own monthly figures for the United States, read on 21 September, with the page each search belongs to.
Some of the phrasings you sent over are the way an engineer describes the work. The ones below are the way buyers ask for it, and those are the ones each page is written around.
One thing before the numbers: do not add them together. Google groups near identical phrasings and reports the group's total against every one of them, so seventeen ways of writing "led pcb board" all read 880. That is one pocket of 880 people, not seventeen.
The six pages, and the demand in front of each one
The bar is the single biggest search that page is built for. The full list for each page follows underneath.
Page by page, the searches behind it
LED PCB and MCPCB design
The largest pocket of demand on the list, and the closest match to what you actually make.
| led pcb board | 880 a month |
| led pcb | 260 a month |
| mcpcb | 210 a month |
| custom led board | 140 a month |
| round led pcb | 70 a month |
| aluminum led pcb | 50 a month |
| custom led pcb | 50 a month |
LED thermal and heatsink design
Second largest, and the one where people arrive already holding a specification. Anybody typing a wattage has a part in front of them.
| led heatsink | 720 a month |
| 10w led heatsink | 50 a month |
| led thermal management | 50 a month |
| cob led heatsink | 30 a month |
| 20w led heatsink | 30 a month |
| aluminum led heatsink | 30 a month |
LED enclosure and driver
Steady and small. Part of this audience is lighting reptile tanks rather than commissioning a build, so the page has to say who it is for in the first line.
| led driver enclosure | 50 a month |
| led enclosure light | 40 a month |
| led power supply enclosure | 40 a month |
| led driver pcb | 30 a month |
Manufacturing and supply
The smallest numbers here and the most valuable ones. Nobody types the word "manufacturer" unless they are shopping for one.
| grow light manufacturer | 50 a month |
| led pcb manufacturer | 40 a month |
| mcpcb manufacturer | 40 a month |
| led pcb supplier | 40 a month |
| led grow light manufacturer | 30 a month |
Turnkey LED manufacturing, and prototype design, CAD and drawings
No measurable demand in any phrasing we tried. "LED prototype" returned four phrasings in the whole of the United States.
| turnkey led manufacturing | none found |
| led prototype design | none found |
| concept to production led lighting | none found |
Both pages still get built, for a different job. They answer the question somebody has after they land on the PCB page and start wondering whether you can take a thing all the way to production. They close people who already arrived. They do not bring anybody, and we would rather you knew that now than judged the project on them later.
Why the pages will not say "custom LED"
It is the phrase on your homepage today, and it is a busy one for the wrong reason. In the United States "custom LED" is dominated by people shopping for custom LED signs, roughly 9,900 searches a month, and custom LED car lighting, roughly 1,000. Writing your pages around it would bring you sign shoppers.
"LED PCB", "MCPCB" and "LED heatsink" bring you the person who needs a board designed. That is the whole reason for pulling these numbers before writing a word of the site.
What this means for the build
None of this is a question of how hard these searches are to win. You cannot be considered for a search when there is no page to consider.
Right now the six things you sell share a few sentences on a single page, so there is nothing for Google to put in front of any of the people above. The build gives each one a page of its own, written around the searches listed here, with the basics underneath it that let Google read it and place it.
Every page in the proposal has a number on this sheet behind it, apart from the two we have told you do not.