Fluorescent tubes

A tube is chosen on three figures: its diameter — T8 is 26 mm, T5 only 16 mm, and the two are not interchangeable — its length, and its three-digit colour (830 = 3000 K warm, 840 = 4000 K neutral, 865 = 6500 K cool).

Wattage almost always follows from length: 18 W for 600 mm in T8, 36 W for 1200 mm, 58 W for 1500 mm. We also stock Grolux horticultural tubes and the high-efficacy Polylux range.

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