SO IM DOIN THIS WITHOUT A TENT IN MY CLOSET.. MYLAR ON THE WALLS & I DO HAVE 3 LIGHTS I GOT FROM WALMART ONE FULL SPECTRUM.. 2 JUST RED LIGHTS WELL THEYRE FULL SPECTRUM AS WELL BUT I JUST HAVE THE RED LIGHT ON.. I HAVE A TABLE FAN BLOWING..
Blurple Lights are a bit outdated but I would suggest that you keep it always on purple.
I would suggest getting a full spectrum LED light first so that it has good light to give you those big buds.
With regards to the rest of your plant I think it's leaves are very dark showing Nitrogen Toxicity but I can't be sure because of the lights.
Good luck with the rest of your grow.
Hiya growmie.
If ur on a budget for a growlight I recommend phlizon. Very affordable.
I do recommend an upgrade. Even their 240w is around 150$ roughly. (They have 100w also bit recommend atleast 240w for a small grow)
Hope it helps.
Also u can try tentbuddy, it's a free light meter app , or if u use a apple phone photone will work.
That way u can get the most out of ur current light..
Check out a video on YouTube "Dr.bugbee, maximize cannabis yeilds" video is like 45min long and explains alot that Is good to know.
Good luck !!