"Older light bulb" = incandescent bulb
"swirly light bulb" = CFL (Compact FLuorescent) bulb
For growing plants, CFL is better because they don't get as hot as incandescents and won't burn the leaves when you position them as close as they need to be. There is usually a
wattage equivalent on the front of the package. Look on the back of the packages and base of the bulbs for K rating (color) and Lumens (brightness). Brighter the better (100w equivalent or higher).
FWIW -- I didn't know all these terms either 3 yrs ago. Someone else posted in technobabble and I became curious enough to look them up.
Like I always tell my 14 yr old -- You kids have it so easy... If you don't understand any word or know what something is, just look it up with Google (or Bing) or any internet search engine.
-- My daughter just needs help with the spelling if she gets it so wrong that even the search engine can't give her back the correct spelling.... (Grrr -- growling in frustration) Mama! how do you spell [.....]!!!!????
...words you see here, you can just copy-and-paste
BTW, if you are curious about potato fruits and seeds, look for TPS (True Potato Seed) sticky thread at the top of Seed Starting Forum, and run a search in the forum search bar at the top of the page. It's been discussed in several previous threads. (lighting has been discussed in depth here too) You may need to adjust the K rating of the lights to encourage blooming later, but that's later. You will need a lot of light. The one lamp is likely not enough.