Not really, shadowing is minimal because it comes at all angles from the complete strip. I now have more light on the bench than I did before.
Quite nice panels, but isn't its light too directional, especially when all of them placed on roof at the middle of the room?
It looks like, there is much more lumens now, but shadows too
![Undecided :-\](https://www.eevblog.com/forum/Smileys/default/undecided.gif.pagespeed.ce.cCZ6w-jWpR.gif)
![](http://s11.postimg.org/fb4qa6spf/dave_lighting_shadows.png)
It is a lot of light in the room, but it is not uniformly distributed. Additionally those panels are very thin and flat, so not too much light for room walls and I do not know, but those corners looks very dark.
When looked into this specyfication of maybe similar 40W panels
http://www.lumin-lighting.com/products/441_Platinum-Series-LED-Panel-Light.htm we get among others such parameters:
Lamp Rated Total Power: 40 W
200 Pieces of SMD LED 4014
Beam Angle: 120°this means that there is 30° degs shadows on the walls, so when this room is maybe 4m wide with those panels inside, there is let ssay 1.5m from those panels to wall roof, than we get shadows on the walls:
tan(30°)*1.5~0.9m ~1m from roof with very poor lighting conditions and this effect seams to be visible on top left roof wall corner in spotted photo
![Confused :-//](https://www.eevblog.com/forum/Smileys/default/confused0024.gif.pagespeed.ce.5xOqKkq0Co.gif)
Quite interesting decent power LED panels, however I'd rather made measurements of room roof, than if we know what beam angle is and how many such panels we have, than simply I'd like to make rather otimization using eg. Monte Carlo method, to randomly locate them in all posible places on the roof (but in software of course
![Evil >:D](https://www.eevblog.com/forum/Smileys/default/xevil.gif.pagespeed.ic.tdrs7Uj5gu.png)
) and by calculating in room areas of interest expected luminance from all placed panels, I could choose combination, which probably will create more uniformly distributed light from those flat thin LED panels
![Phew :phew:](https://www.eevblog.com/forum/Smileys/default/phew.gif.pagespeed.ce.n2uLOVFYMP.gif)
But ok, just only thinking on possible ways to optimise placement of those panels on the roof, since their mechanical construction and beam angle can affect overall lighting conditions in the room. Probably I will try to do it this (maybe hard) way, but when we have such amount of light, than such effort to simulate in virtual reality first might be worth to try
![Popcorn :popcorn:](https://www.eevblog.com/forum/Smileys/default/EatingPopcorn.jpg.pagespeed.ce.yJ6TmC5fSa.jpg)