My Breaker Box.. Pics

Hi, Right now im Running One 1000w hps Multiple Fans and Pumps..
So Ive been thinking about adding another Light or 2 but i don't know much about electrical and I'm trying to find out whats the max Wattage i can Run at my location Thanks.. Heres sum pics of my Beaker..

your good-

i wish i had 200 amp service. throw in a new breaker and find the run going to you roomand hook it up, unless it's already on its own, then your good.

if it's on a 20, that means 12 gauge wire, which is great. take into consideration that running those kind of loads continuously, requires a little different method of figuring amps. add up the total amount of amps and add 20% for continuous duty cycle, use that number instead of actual amps for figuring the load. likewise with the wire. 12 gauge is rated at 20 amps, subtract 25% for continuous duty cycle, so 12g will carry 15 amps with the load you intend. if you're running 110 on the 1000w, that's ten amps + 20 %, so 12 amps continuous duty. switching to 220v wil cut the amps in half, so only 6 amps.
you may have to run an additional circuit. get with iam5toned, he is a master spark, and has a thread dedicated to electric questions

link----->https://www.rollitup.org/indoor-growing/240481-bored-electrician-answer-your-questions.html