Gtx 1050 on a 250w PSU?

Solution
The PSU is more or less a 228W PSU, since the most powerful components these days (for the last 14 years or so) use the +12V rail. While you technically have just enough power to run a 75W GPU (the CPU can be somewhere around 100W at full load), you have a PSU that's both old and of very low quality. You can risk it, but that wouldn't be my recommendation.
Thanks for the answer, Im sorry that i took so long to respond, the model is liteon ps-5301-08ha (it seems to be 300w) here is a photo i took of it
http://i64.tinypic.com/11vgleu.jpg

not sure if thats all the info, i couldnt find anything on the internet about the model but i dont think the brand is really good, would that be enough to run a 1050? (or even a 1050 ti?)
 
The PSU is more or less a 228W PSU, since the most powerful components these days (for the last 14 years or so) use the +12V rail. While you technically have just enough power to run a 75W GPU (the CPU can be somewhere around 100W at full load), you have a PSU that's both old and of very low quality. You can risk it, but that wouldn't be my recommendation.
 
Solution
To run a 1050ti:

PCPartPicker part list / Price breakdown by merchant

Power Supply: SeaSonic 350W 80+ Bronze Certified ATX Power Supply ($31.99 @ SuperBiiz)
Total: $31.99
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-12-05 13:43 EST-0500

To leave yourself room to grow into a more powerful GPU at a later date:

PCPartPicker part list / Price breakdown by merchant

Power Supply: SeaSonic S12II 520W 80+ Bronze Certified ATX Power Supply ($54.02 @ B&H)
Total: $54.02
Prices include shipping, taxes, and discounts when available
Generated by PCPartPicker 2016-12-05 13:44 EST-0500