I have a yucatan white habanero from refining fire chiles. Its leaves are narrow and long like yours. I have it next to all my super hots, and it sticks out like a sore thumb. All the pics i can find of mine online show the same leaf shape. Hope that helps.
I started some watermelon seeds in one of those jiffy kids starter cups for my daughter. Had a little white fuzzy mold all over the top of the peat. A couple drops of peroxide did the trick. Can't argue with a cheap and easy solution.
I have some Yellow primos that popped in 3 days. But had a brown moruga and reaper pop in 28 days. Guess it all chalks up to genetics and how the seeds where dried.
My little 18 inch sunblaster t5 gets pretty warm. I wouldn't go any closer than 5-6 inches. I know some guys use t8 lights and cfl rigs, that let the plants touch bulb. T5's just get to hot for that.