Heat or light stress

Trying to figure out what is behind those leaf signs my plant have developed. Searching over the forum for light stress didn't returned my symptoms. As you can see in the pics marked with red, some leafes are a bit curled upwards while only one has also some little yellow dots. That's all the signs that the plant have and i think i should worry about.
The plant have 5 weeks and during the first 3 weeks the temp was around 30°C, while the last 2 weeks the temp is around 26°C.
The light is a 200W SpiderFarmer which is dimmed at 40% intensity. The manufacture said it must be anywhere around 75-100% intensity once the veg period started but i am afraid not to burn the plant. I have also read on the strain reviews that someone said the strain does not like too much light. I don't know that that means, but i don't want to ruin it dimming the light too much.
As you can see in the other picture, the plant looks good overall, perhaps a little yellowish which i don't know it's a reason to worry about.
Regarding nutes, i have only watered twice using BioBizz nutrient for veg period. Some said said it's better to use a method such as water-feed-water-feed etc. That means using nutes from two to two waterings. Anyway, regarding the leaf that has yellow dots on it, i want to say that it's the only one that shows this kind of stress, being either from light or heat.
That said, i'm waiting your suggestions so i can improve my skills growing the plant as healthy as possible.

Thanks!

Ive been learning about different plants having different light saturation points. My veg plants tend to like dim lighting tho. For soil they look pretty good. I wouldnt worry too much and just keep doing what you are. Update if it gets worse.

I usually dim when I see excessive purpling of stems and leaf stems. Then it will start to look like a nute deficiency and get worse. Just raise or dim and aim for a very very lightly tinted purple look in those stems. If still doing it it might be something else.

I found I got that cupping you show with just some excesive air flow idk Ive seen people say countless times not to worry about some cupping.

Heat would be taco shape leafs, along with the described as it could mess with plants ability to do its thing. Should be good up to 82F.