Just stay under 800 pix in width and the forum should look fine, also HTML codes ARE NOT SUPPORTED on this forum. For light related images feel free to use the gallery but for other pics flickr, photobucket, imageshack, imgur etc would be better. For some of them you can just upload.
Please do not upload irrelevant pictures on the gallery, pictures of stuff related to lighting is OK.
Also that post was in reply to someone else on the forum as you can see by the quotes and is not intended as a general guide, thank you.