Finishing in october will be close... It takes approximately 2 months for most strains just to flower.
But...
Autoflower plants are plants that have been crossed with the Ruderalis strain and will flower much sooner. I think I have heard some plants finishing seed to bud in as little as 70 days? Although you may not want autoflowers, if you want a fast finishing flower - thats really your only option. Traditional Sativas and Indicas take 8-12 weeks to finish just the flowering process. The strain I am growing now if I started flowering today would finish September 17. And thats not accounting for vegetating - which is best to go until the plant is mature with Sativa/Indicas which can take 2 months on it's own. So an autoflower may be best, and you may have time to grow them and get a little bit of a cure in there for maximum taste and potency, before oct 19
Normally I dont recommend autoflowers but if you are in a bind and if you are in a country that has tough drug laws (Which you do lol) and really want to get your smoke on, they may be the best way to go. Maybe not the most potent stuff but they can get pretty close - and it sounds like you will have a low tolerance by the time they finish.
And stick with the flouros for vegging - or at least early vegging
(also, your link doesnt work, private listing/out of country)
Also make sure on those flouros to look at the bulb. Should be a number somewhere on it - 2500K, 5000K, 6500K or similar. You want 6500K or 6700K. This number indicates the wavelength of light being put out by the bulb, and the 6000+ spectrum is closest to what the plants would expereince in nature during the summer vegetating months. Later during flowering you switch to 2500K/5000K or the HPS so it thinks its the winter sun and will start flowering. Personally a little tip, take a week to wean into 12/12 (go 18/6, 17/7, 16/8, etc...) and keep with the 6500K flouros the first couple days of real 12/12. Switch to 5000K flouros when they start sprouting hairsa and the next 1.5-2 weeks of flowering. Then for mid-late flowering get them under the HPS. Weaning em limits the stretching and switching the light over only after being solidly in 12/12 really helps mitigate stress - instead of going from a new light and completely new "day" lengths it gets weaned into all of it gently.
of course growing autoflowers, its much easier... you put them under a flouro until they start to veg. Then you can put them under any light for any light cycle you want. Its that easy. They will flower then they are ready.