Lighting

Yes Man, your plant need more light. Place the light to 30 cm (or less) from leaves and when you will transplant in a bigger pot burie at least the half of plant in soil. 24h of light cicle is too much, switch to 18/6, or 6/2 to keep veg on. P. S. Don't use any app to measure lux, they don't work with blurple lights.

Yes. 18/6 is optimum. Nothing on planet earth is "designed" to function for days/weeks/months without sleep. Your plant will need a dark period for a proper metabolism and normal functioning. A 65 watt light is pretty well useless, to be honest. Your plant will grow, but it will be a bit like growing an elephant by feeding it bread crumbs. Try lowering your light to about 8-12 inches, there is no risk of burning your plant with a 65 watt light. Regards, Organoman.

Most likely the light. Or your soil might be over wet or been wet for a while causing it to go a bit leggy.