Is this 42 Watt equivalent to 150watts bought from walmart good for 1 younglin? ASAP

go by real watts but yes from what I know 42 watts it is fine for like three weeks max imo or soon then you might wanna get some more lights...I use 2 foot 4 bulbs T5 96 watts for my seeding until about 3-4 weeks old and works fine...

I use the same light as Heisenberg for young plants.
Works Great, I have a larger 4 bulb 4' for my veg, it's 54 watts per bulb, 116 true watts.

i am a little late to the party but i have vegged and flowered using one 4 bulb high output t5 fixture plus 2 26 watt cfl bulbs with pretty good results. my tent is actually intended as a mother tent so i don't have a lot of vertical room nor much leeway for the heat created by hid lamps. hockey - i am growing 2 master kush plants now if you are interested, my signature has a link to my grow journal. i am a couple weeks from harvest now but i have pictures from about every week since i planted the seeds. btw-my seeds are dutch passion feminized too and 2 out of 2 are females so they must know what they are doing to get them femmed...