Below is a light meter comparison of all G & R Labs’ UV light meters.
| Features | Model 100 | Model 200 | Model 202 | Model 220 | Model 221 | Model 222 | Model 325 | Model 410 |
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| Dual Range |  |
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| Measurements | ||||||||
| MW/CM2 | |
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| W/CM2 | |
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| MJ/CM2 | |
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| Two Sensor Probe | ||||||||
| Channels A & B | |
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| Displays | ||||||||
| Single Pulse MJ/CM2 | |
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| Accumulated MJ/CM2 | |
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| Peak MW/CM2 | |
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| Time | |
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| Calculates 5 measurements | |
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| Calculates 9 measurements | |
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| Average MW/CM2 | |
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| % Uniformity from center | |
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| % Deviation from center | |
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| Rechargeable Battery | |
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| Computer Interface | |
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