I use those home depot clip lights with led bulbs. Got a higher end bulb shining on my ac110 with emersed plants (pothos and mint, my bacopa floated back in the tank lol). It's a philips daylight spectrum floodlight with a reflector built in. Think I paid 15 for it and 7 for the lamp haha. I have the same lamp and a 2 dollar soft white led on my rescued goldfish tank and it keeps hornwort alive long enough to be nibbled. I also have a 15 watt floodlight I got on amazon for 13 bucks on my convict tank which seems to be good for pothos and hornwort. That one runs extremely hot though after like an hour so I probably need to rig up a pc fan for it. I also had to buy a cord and switch for it since I didnt read the description, pain in the ass since I never mess with electronics other than pcs haha. Get one with a plug to save the hassle if you go that direction.