Jimmys learning

Use standard cfl bulbs or led bars

I'd trust numbers on anything light related, they know their shit about it. LED has come a long way since the blue/purple ones. Get a new age one for cheep. Many brand have entry level lights. The ones I use from Medic Grow are good. and cheep. Mini Sun 2 is the light name. comes in diffrent wattages. They have other ones as well.

Save up some money and buy LED. Cheaper to operate, less heat, replace less often. they are cheaper to own by any common sense measure. Stick to 2.7-2.9umol/J effiacy ... many manufacturers lie about these ratings. compare to specs at diode's original manufacturer, i.e. bridgelux or samsong.com etc, and you can tell who is lying through their teeth. If there is an LED out there with 3.0 umol/J, it's probably a very cool (favor B too much) CCT that you don't want anyway. unless you live somewhere cold, the reduced heat is a bonus, too. very easy to size lights up to space... if you grow photoperiods, you want ~80umol/s per sq ft based on total umol/s produced by light. If you only grow autoflowers on an 18h cycle, you want 67% of that. Easy peasy multiplication. 16 sq ft? you want a light producing roughly 1280umol/s ... fwiw if you find the 'perfect' light and it's 1250, close enough! This number is not an enxact value and is relative to local variables, so YMMV a bit. It is a good ballpark to start. Should err slightly on high side, if i recall. Think it is "861 ppfd" target for 12h photoperiod needs.