Any lead acid can deliver an almost infinite current at least once, but for a short time, thats why cars have had working starter motors all these years. They are not good at over-heavy current for extended periods. As part of their chemistry, they do, under load, charging or discharging, do their best to vent gas. Even "sealed" ones. "Sealed for life" means that once enough of the contents have vented away, you have no means of replacing it, so it is then a dead 'un. Because they are an interleaved plate construction, under heavy load, the current though the plates in not evenly distributed. This results in uneven heating, with the attendant problem of potential warping, and uneven chemistry happening on the plate surfaces. This eventually finishes the battery.
They are generally OK with current at 1C, but intended for 0.1C. Pulling more does shorten their life expectancy, but when they were the only game in town, had to be used. Now there are alternatives that are designed to do better. A boat that requires modest current and is heavy, they are ideal, being relatively low cost and very recyclable. A same capacity or size NiMH will cost more, but weigh less, will deliver a heavier current longer, and will have simpler basic charging requirements until you want to fast charge.
Bulbs in series or parallel? In series they all draw the same current, and, if the same rating, get 1/n of the starting voltage where n is the number of bulbs in the chain. In parallel, they all get the starting voltage and each draws its own current. Provided that they are rated for either the starting voltage or more.