Try two or three hours before bed, see how that works for you. Remember not to let yourself be exposed to white light during that time, which in practice means that if you go to the loo in the middle of the night, either put on your orange specs or get used to being in the dark. I went for leaving the light off, you get used to it quite fast, and my hall is just dimly lit enough that I can see down it without upsetting my sleep.
I got prescription glasses, after ascertaining that the method worked for me, because I found that trying to wear two pairs of glasses at once was deeply uncomfortable, and my eyesight is severe enough that I have to wear specs all the same.
You really don't need to pay lowbluelights.com's prices for, well, anything. They're just the same bulbs and glasses that you can buy elsewhere, marked up a great deal. When I mentioned marigold yellow, it's because I've seen two shades of opaque yellow coatings on bulbs. One is a pale yellow, more of a lemon really, and that lets a bit of blue light through. The other one is a rich yellow that leans a bit towards orange. You can also use amber bulbs if you prefer. I have a couple of small frosted glass lamps which take pygmy (sign) bulbs, and the yellow in those is the lemon that doesn't work, so I use orange for those instead. One by my bed in my flat, one by the bed in my boyfriend's flat. In my flat, I also have a normal-sized bulb with the marigold yellow coating (sort of behind a glass lamp for various reasons) and a string of fairy lights with dark orange roses (made from rubber plant leaf skeletons) above that in the bookcase. Not essential, but pretty and atmospheric, and my boyfriend finds it relaxing as well. I don't have any orange lights in the living room, but I do have fairly low level lighting in the evening. You can get yellow or orange fluorescent bulbs as well, which I've not tried. Of the ones on the Amazon page, the Satco one looks like the colour I'm talking about, but most of the rest are probably fine as well. Just steer clear of anything transparent, which will include all reflector bulbs, and anything that looks any lighter than that really bright yellow you see the most. You can test a bulb by turning the other lights off and holding a CD or DVD up near the light. Turn it to and fro until you see light reflecting off it. If any of that light is blue or violet, then you've got blue light coming out of your bulb. If it's just, say, a small amount of green, I wouldn't worry.
Those specs look fine. You want 100% blue light blocking. A bit of light creeps in around the edges, which is why it's a good idea to keep the background lighting reasonably low. As far as I recall, if you hunt for orange sunglasses on Amazon, you find loads, with lots of reviews from people using them for this purpose. Word must have got out somewhere. If you're in the UK,
Optima Low Vision sell a good range of orange glasses.
Here is the links page from my website, although I've not checked it in years so some links may be out of date.