bugs?

i have two potted outdoor plants both have entered the veggy stage, 1ft tall.
the leaves are turning yellow, black, they have what looks like little black tar/rez spots on some of the leaves.

looking at the one plant i noticed a very small white spider bug crawling which i killed. ive removed all the black looking rez spots on the leaves, the next day the spots are back on other leaves.

can it be spidermites? mold? i was going to buy 'Scotts EcoSense insecticidal soap or use a tablespoon of 'sunlight dish soap mix with water in a 1L spray bottle to spray underneath the leaves and top, this is the second day today spraying the plants with the 'sunlight soap mix

Plants info:

• nutes N, P, K & M
• warm rain water
• on stormy days for sun, i use a 275Watt sunlamp bulb which is kept 8 inchs away from plants
• 12hrs sun temp usally 75°F - 80°F/ 12hrs of darkness temp 65°F - 70°F/

• indoors at night well vented with two fans/open window

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What nutrients are you using? It could be nutrient deficiency or burn. But since your leaves are really bright, it looks a little bit like nitrogen deficiency. How often are you watering it?