Welcome to the Farm! I'm a big fan of Advanced Nutrients products. I would recommend following their labels. They pay very intelligent scientists to figure out the formulations, recommended rates, and at what time to apply them. Bud Ignitor is suggested to be used during the first two weeks of the Flower cycle. Mix it right in with the Sensi A + B nutes and then check the pH. Always check pH after you add the nutrients. I would strongly recommend at least getting Bud Candy and Big Bud if nothing else. Sensizym is an excellent product and so is Nirvana. Overdrive is for the last two weeks of Flower. All excellent products from AN in my experience using them and many other growers.
I used to grow in Ocean Forest exclusively and have switched to a mix of Sunshine Advanced Growers Mix #4 and Coast of Maine Stonington Blend and find it far superior for drainage and root growth. Coast of Maine has quite a bit more food in it too than Ocean Forest. Something to maybe consider trying for the next grow. I do recommend cutting the Stonington Blend with something porous and fluffy. It doesn't necessarily have to be the Sunshine mix.
As far as the light goes, it is recommended for that space and will get the job done, but in my experience if you want dense resinous high quality flowers, you need powerful lights. One option is you can barely fit another one of the lights you have in there to increase PPFD, but I'm pretty sure it will fit. That's the cheapest option. You can get one on Amazon for $150. That light has a pretty good spectrum for both Veg and Flower, but it is a better Veg light because of the blue spectrum being so strong. Cannabis needs more red light in Flower. No need to be using any supplemented CO2 until you dial in your environment and get the PPFD up closer to 1500-2000.
I would recommend a light spectrum that looks closer to these lights.
Optimize your harvest utilizing the Ionboard S24 LED light. This 220W full spectrum board produces intense usable light perfectly suited for 2x4 spaces.
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2-3 week lead time HLG 260 Rspec FR Pre-Assembled Kit is a 260W LED lamp and powered with our custom QB272 Quantum Boards®, an LED Module designed by Horticulture Lighting Group. Each board has Full Spectrum White LEDs, Deep Red 660nm LEDs, and Far Red 730nm LEDs. Top Features High efficiency...
horticulturelightinggroup.com
Depending on how much you want to push the plants, the best option for that space is this light right here. I got six of them and they're phenomenal lights. More than double what you said you're willing to spend, but light is a major factor pushing growth. It all depends on your goals and what you're willing to spend buddy. Best of luck!
HLG 350 Diablo Commercial Indoor Horticulture LED grow light is designed to replace a single-ended 600 watt HID with just 330 watts. With a rectangular footprint this fixture is ideal for flowering smaller grow spaces or vegging in commercial grow.
horticulturelightinggroup.com