They were easy to install and importantly the spring tension gives enough pressure to keep the frame of the lamp straight and level. Also, they are square, which is a big plus. Aren't you tired of those round lanterns? It's like the shops don't have a choice. Also, the price for them was quite low at around $25 for 6 bulbs. They give a nice, fairly neutral color output AND the pediment can be rotated 360 AND tilted around the X/Y axis! Easy connection and BAM! You have great lights! Yes, dimmable with the correct Lutron switch.