Some plants need more light than others, especially if you live in a north-facing property like me. 

That's why I made some window shelves. 
The project was carried out using interlocking mechanisms to make the support more rigid.

I look forward to receiving your photos of your seedlings basking in the sun.

Here are the suction cups I bought: https://www.amazon.it/dp/B0DP4Q5GFD?ref=ppx_yo2ov_dt_b_fed_asin_title&th=1