This one is more comparable to your listed amount for the Sansi:

MARS HYDRO TS 600W LED Grow Light 2x2 ft Sunlike Full Spectrum Led Grow Lamp Plants Growing Lights for Hydroponic Indoor Seeding Veg and Bloom Greenhouse Growing Light Fixtures Four for 4x4 Coverage https://www.amazon.com/dp/B07VL8FZS1/ref=cm_sw_r_cp_api_i_AnVzEbKY8YPE2

well damn, nice find

i just got a mars ts600 for $83 to use in my 2x2 veg tent

i'm considering returning it now

2022 Upgraded MARS HYDRO TS 600W... https://www.amazon.com/dp/B07VL8FZS1?ref=ppx_pop_mob_ap_share

This is the one I have. A little pricey but totally worth it. I have two of them and I like them more than any of the other grow lights I have purchased. They are really powerful.

Okay. Of the 3 that you listed, I really like the SANSI grow light bulbs. They give off a lot of light with a good color spectrum, and they fit in a standard light socket.

Two of those SANSI bulbs will set you back $80. For $10 less, you can get a ViparSpectra P600 panel. For $10 more, you can get a Mars Hydro TS 600 panel.

I'd just pick up another grow light for the kratky jars

Maybe this unit to cover all 3 plants if you can afford it

https://www.amazon.com/VIVOSUN-Samsung-Dimmable-Sunlike-Spectrum/dp/B08GNZ7M74

here's a $100 unit as well which should be enough for those plants if you wanted to save money

https://www.amazon.com/VIVOSUN-Samsung-Dimmable-Sunlike-Spectrum/dp/B08772CTK7

Mars Hydro also has a $80 unit

https://www.amazon.com/MARS-HYDRO-Spectrum-Hydroponic-Greenhouse/dp/B07VL8FZS1

Like this here?

Well yes that would be smart since you are in England i would definitely suggest getting some supplemental lighting and even if its cactus and succulent soil if it is the miracle grow brand (it kinda looks like it is) its not going to be ideal i would suggest adding 50/50 perlite to miracle grow soil. With the soil like is now it probably wont die but it wont be doing the best it can I'm sure you could get some perlite as for as lighting i know amazon has a brand called mars hydro Limited-time deal: 2022 Upgraded MARS HYDRO TS 600W LED Grow Light 2x2ft Coverage, New Diodes Layout Full Spectrum Grow Lamp for Hydroponic Indoor Seeding Veg and Bloom Greenhouse Growing Light Fixtures Four for 4x4' https://www.amazon.com/dp/B07VL8FZS1/ref=cm_sw_r_cp_api_i_dl_24Y5D78DAKM9EF67WJBT?_encoding=UTF8&psc=1 if you put them in a bright window and have this guy about two feet above the plants that should be enough light to prevent etiolation

Or 3 of these Is a lil cheaper.

https://www.amazon.com/dp/B07VL8FZS1/ref=cm_sw_r_cp_apa_glc_fabc_N7V8W0CR0S7TYB5J53N8

https://www.amazon.com/dp/B07VL8FZS1?ref=ppx_pop_mob_ap_share

i got you

https://www.amazon.com/MARS-HYDRO-Spectrum-Hydroponic-Greenhouse/dp/B07VL8FZS1

https://marshydro.eu/collections/ts-series/products/ts-600

https://www.amazon.com/gp/aw/d/B07VL8FZS1?psc=1&ref=ppx_pop_mob_b_asin_title

1. The lack of windows in your garage is not as big a deal as you might think. When the plants go dormant, and the temperatures are in the 35-45 F range, they can get by without any light. Take a look at this video. Liguus keeps his plants in a cold, unlit garage in Chicago without any problems.
2. Nepenthes and tropical/subtropical sundews should do well together, as long as the sundews don't need to be sopping-wet.
3. CalCarn Guide on Building a Carnivorous Plant Bog Garden
   Grow Carnivorous Plants in a DIY Mini-Bog
   Yes, a 50/50 mix of peat moss and perlite/coarse sand is good for the North American plants.
4. You want a bright, full-spectrum, LED lighting system. There are a bunch of them on Amazon; search for "full spectrum led grow light". MARS HYDRO has some nice panels (here and here). If you want individual bulbs, then SANSI has some nice ones.
5. The List of Links post in r/VenusFlytraps has many good vendors.