The amount of heat vented scales with the amount heat generated by the laser. A lightweight mod will generate more heat than an efficient so therefore it will dispel more heat from your ship than the efficient. The lightweight mod is also better because you get more speed. I'm too lazy to engineer so I kept my efficient mod instead of lightweight. Efficient works well enough for me.... but then I am comparatively a "bad" pvper. lmao
The critical part about lightweight is it has a distro bonus of 35%.
Thanks for the reply. What do you run then? Is it a 4 rail 1 beam fdl too? Gotta say it's fun, I like rails.
This is the build I use