looks like the left from my vantage is more shadowed. If you can raise that fixture somehow I believe you'll get a little more light distribution. Shouldn't hurt your intensity any as that tank isn't overly deep.
Sadly, I realized I can't raise the clamp light. I'll have to get another fixture, but that's not an option due to a tight budget.
I think you're going to be disappointed once you get it planted up and realize you're only getting about an 18" radius of coverage with just the single bulb. You can certainly start off with it but I would start saving to add a fixture and get a couple bulbs to match that wattage.
Something like this has been suggested in the past. It is what some people use to escape the $100 fixtures.
Two would be perfect probably. Other suggestions would be welcomed. I am not great with lights, I'm just a moss guy.
Yup, I'm the type of guy who is cheap lol. I asked my dad for a new fixture and I told him it was going to be around $100. He gave me a look that made me regret about even thinking of getting a full size one. I actually do have an old fixture for this, but its max wattage is 15 watts, which is not sufficient for growing HC.