The phrase "a range of optimal" is correct and usable in written English.
It can be used when discussing the best or most effective options within a certain spectrum or set of conditions.
Example: "The study identified a range of optimal temperatures for the growth of the plant species."
Alternatives: "a spectrum of ideal" or "a variety of best".
Calibrated models were projected forward under a range of "optimal" fishing efforts designed to achieve economic, conservation or biodiversity objectives.
The technical feasibility as well as the economic viability of this installation was investigated for a range of optimal configurations.
We found that parameters representing boundary conditions tended to converge toward an optimal single value, whereas parameters controlling geomorphic processes are defined by a range of optimal values.
We model and experimentally characterize the capillary and heat transfer performance of liquid spreading layers consisting of mono-layers of Cu particles and identify a range of optimal particle diameters maximizing their performance.
The presented method achieves practical solutions to a series of cost minimizing problems, giving the designer a range of optimal bracing configurations which can be selected in response to the continuously changing structural and architectural requirements throughout the design process.
The good agreement between the predicted and experimental results covering a range of optimal operating conditions shows that the proposed model provides an accurate representation of the behavior for the PEM stack.
When dealing with conflicting objectives, decision makers prefer to obtain a range of possible optimal solutions from which to choose.
These features are essentially the existence of several peaks and troughs, indicating a range of locally optimal mutation rates in terms of (a measure of) convergence time.
As a result of the project, the decision makers were provided with a range of nearly optimal solutions and design rules which reduce considerably the length of stay and waiting times for emergency department patients.
The 23°C is in a range of QPX optimal growth conditions, however this temperature condition was also associated with an up-regulation of genes related to oxidative stress (eight up regulated transcripts, Figure 4).
Evaluating, or choosing amongst a range of sub-optimal solutions is another inefficient strategy.
